diff --git a/docs/.vitepress/theme/components/Downloader.vue b/docs/.vitepress/theme/components/Downloader.vue
index db343f37..b8c8b6a5 100644
--- a/docs/.vitepress/theme/components/Downloader.vue
+++ b/docs/.vitepress/theme/components/Downloader.vue
@@ -4,6 +4,7 @@
     <button type="submit">Submit</button>
 
     <video
+      v-if="videoSrc"
       controls
       ref="video"
       :src="videoSrc"
@@ -31,7 +32,7 @@ function onVideoLoad() {
 
   const vid = videoEl.value!;
 
-  const q_value = q.value.replace(/\.[a-z0-9]+$/, "")
+  const q_value = q.value;
 
   ws.onmessage = (ev) => {
     const { name, ts } = JSON.parse(ev.data);
@@ -58,8 +59,12 @@ function onVideoLoad() {
               c.toBlob((b) => resolve(b));
             }
 
-            const [min, sec] = t.split('_');
-            vid.currentTime = parseInt(min) * 60 + parseInt(sec) + 1;
+            if (typeof t === 'string'){
+              const [min, sec] = t.split('_');
+              vid.currentTime = parseInt(min) * 60 + parseInt(sec) + 1;
+            } else {
+              vid.currentTime = t;
+            }
           })
           if (b) ws.send(b);
           vid.onseeked = null;
@@ -74,6 +79,7 @@ function onVideoLoad() {
       JSON.stringify({
         name: "download_q",
         q: q_value,
+        duration: vid.duration,
       }),
     );
   };
diff --git a/docs/qVVhBGT0K7Y.md b/docs/qVVhBGT0K7Y.md
index 1033f3d1..869f5a2f 100644
--- a/docs/qVVhBGT0K7Y.md
+++ b/docs/qVVhBGT0K7Y.md
@@ -1,4 +1,5 @@
 ---
+title: 【剥茧The Truth Within】EP02：识骨寻凶！罗云熙变天才法医解码诡案 | 罗云熙/刘雅瑟/江奇霖 | 悬疑 剧情 | 优酷 YOUKU
 video: /qVVhBGT0K7Y.webm
 ---
 
diff --git a/package.json b/package.json
index 99a1ce06..fc0f7fef 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "type": "module",
   "license": "MIT",
   "dependencies": {
+    "gray-matter": "^4.0.3",
     "vite": "^7.3.1",
     "vitepress": "2.0.0-alpha.15",
     "vue": "^3.5.27",
@@ -12,11 +13,13 @@
   },
   "devDependencies": {
     "@types/node": "^20.19.30",
-    "@types/ws": "^8.18.1"
+    "@types/ws": "^8.18.1",
+    "concurrently": "^9.2.1"
   },
   "scripts": {
-    "start": "node .",
-    "dev": "vitepress dev docs",
+    "dev": "concurrently 'pnpm:dev:*'",
+    "dev:server": "node server.js",
+    "dev:vite": "vitepress dev docs",
     "build": "vitepress build docs",
     "preview": "vitepress preview docs"
   }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 51d18d85..d1fded94 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -8,6 +8,9 @@ importers:
 
   .:
     dependencies:
+      gray-matter:
+        specifier: ^4.0.3
+        version: 4.0.3
       vite:
         specifier: ^7.3.1
         version: 7.3.1(@types/node@20.19.30)
@@ -27,6 +30,9 @@ importers:
       '@types/ws':
         specifier: ^8.18.1
         version: 8.18.1
+      concurrently:
+        specifier: ^9.2.1
+        version: 9.2.1
 
 packages:
 
@@ -651,21 +657,52 @@ packages:
     resolution: {integrity: sha512-n/NdPglzmkcNYZfIT3Fo8pnDR/lKiK1kZ1Yaa315UoLyHymADhWw15+bzN5gBxrCA8KyeNu0JJD6mLtTov43lQ==}
     engines: {node: '>= 14.0.0'}
 
+  ansi-regex@5.0.1:
+    resolution: {integrity: sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==}
+    engines: {node: '>=8'}
+
+  ansi-styles@4.3.0:
+    resolution: {integrity: sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==}
+    engines: {node: '>=8'}
+
+  argparse@1.0.10:
+    resolution: {integrity: sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==}
+
   birpc@2.9.0:
     resolution: {integrity: sha512-KrayHS5pBi69Xi9JmvoqrIgYGDkD6mcSe/i6YKi3w5kekCLzrX4+nawcXqrj2tIp50Kw/mT/s3p+GVK0A0sKxw==}
 
   ccount@2.0.1:
     resolution: {integrity: sha512-eyrF0jiFpY+3drT6383f1qhkbGsLSifNAjA61IUjZjmLCWjItY6LB9ft9YhoDgwfmclB2zhu51Lc7+95b8NRAg==}
 
+  chalk@4.1.2:
+    resolution: {integrity: sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==}
+    engines: {node: '>=10'}
+
   character-entities-html4@2.1.0:
     resolution: {integrity: sha512-1v7fgQRj6hnSwFpq1Eu0ynr/CDEw0rXo2B61qXrLNdHZmPKgb7fqS1a2JwF0rISo9q77jDI8VMEHoApn8qDoZA==}
 
   character-entities-legacy@3.0.0:
     resolution: {integrity: sha512-RpPp0asT/6ufRm//AJVwpViZbGM/MkjQFxJccQRHmISF/22NBtsHqAWmL+/pmkPWoIUJdWyeVleTl1wydHATVQ==}
 
+  cliui@8.0.1:
+    resolution: {integrity: sha512-BSeNnyus75C4//NQ9gQt1/csTXyo/8Sb+afLAkzAptFuMsod9HFokGNudZpi/oQV73hnVK+sR+5PVRMd+Dr7YQ==}
+    engines: {node: '>=12'}
+
+  color-convert@2.0.1:
+    resolution: {integrity: sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==}
+    engines: {node: '>=7.0.0'}
+
+  color-name@1.1.4:
+    resolution: {integrity: sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==}
+
   comma-separated-tokens@2.0.3:
     resolution: {integrity: sha512-Fu4hJdvzeylCfQPp9SGWidpzrMs7tTrlu6Vb8XGaRGck8QSNZJJp538Wrb60Lax4fPwR64ViY468OIUTbRlGZg==}
 
+  concurrently@9.2.1:
+    resolution: {integrity: sha512-fsfrO0MxV64Znoy8/l1vVIjjHa29SZyyqPgQBwhiDcaW8wJc2W3XWVOGx4M3oJBnv/zdUZIIp1gDeS98GzP8Ng==}
+    engines: {node: '>=18'}
+    hasBin: true
+
   copy-anything@4.0.5:
     resolution: {integrity: sha512-7Vv6asjS4gMOuILabD3l739tsaxFQmC+a7pLZm02zyvs8p977bL3zEgq3yDk5rn9B0PbYgIv++jmHcuUab4RhA==}
     engines: {node: '>=18'}
@@ -680,6 +717,9 @@ packages:
   devlop@1.1.0:
     resolution: {integrity: sha512-RWmIqhcFf1lRYBvNmr7qTNuyCt/7/ns2jbpp1+PalgE/rDQcBT0fioSMUpJ93irlUhC5hrg4cYqe6U+0ImW0rA==}
 
+  emoji-regex@8.0.0:
+    resolution: {integrity: sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==}
+
   entities@7.0.0:
     resolution: {integrity: sha512-FDWG5cmEYf2Z00IkYRhbFrwIwvdFKH07uV8dvNy0omp/Qb1xcyCWp2UDtcwJF4QZZvk0sLudP6/hAu42TaqVhQ==}
     engines: {node: '>=0.12'}
@@ -689,6 +729,15 @@ packages:
     engines: {node: '>=18'}
     hasBin: true
 
+  escalade@3.2.0:
+    resolution: {integrity: sha512-WUj2qlxaQtO4g6Pq5c29GTcWGDyd8itL8zTlipgECz3JesAiiOKotd8JU6otB3PACgG6xkJUyVhboMS+bje/jA==}
+    engines: {node: '>=6'}
+
+  esprima@4.0.1:
+    resolution: {integrity: sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==}
+    engines: {node: '>=4'}
+    hasBin: true
+
   estree-walker@2.0.2:
     resolution: {integrity: sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w==}
 
@@ -696,6 +745,10 @@ packages:
     resolution: {integrity: sha512-Vo1ab+QXPzZ4tCa8SwIHJFaSzy4R6SHf7BY79rFBDf0idraZWAkYrDjDj8uWaSm3S2TK+hJ7/t1CEmZ7jXw+pg==}
     engines: {node: '>=18.0.0'}
 
+  extend-shallow@2.0.1:
+    resolution: {integrity: sha512-zCnTtlxNoAiDc3gqY2aYAWFx7XWWiasuF2K8Me5WbN8otHKTUKBwjPtNpRs/rbUZm7KxWAaNj7P1a/p52GbVug==}
+    engines: {node: '>=0.10.0'}
+
   fdir@6.5.0:
     resolution: {integrity: sha512-tIbYtZbucOs0BRGqPJkshJUYdL+SDH7dVM8gjy+ERp3WAUjLEFJE+02kanyHtwjWOnwrKYBiwAmM0p4kLJAnXg==}
     engines: {node: '>=12.0.0'}
@@ -713,6 +766,18 @@ packages:
     engines: {node: ^8.16.0 || ^10.6.0 || >=11.0.0}
     os: [darwin]
 
+  get-caller-file@2.0.5:
+    resolution: {integrity: sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==}
+    engines: {node: 6.* || 8.* || >= 10.*}
+
+  gray-matter@4.0.3:
+    resolution: {integrity: sha512-5v6yZd4JK3eMI3FqqCouswVqwugaA9r4dNZB1wwcmrD02QkV5H0y7XBQW8QwQqEaZY1pM9aqORSORhJRdNK44Q==}
+    engines: {node: '>=6.0'}
+
+  has-flag@4.0.0:
+    resolution: {integrity: sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==}
+    engines: {node: '>=8'}
+
   hast-util-to-html@9.0.5:
     resolution: {integrity: sha512-OguPdidb+fbHQSU4Q4ZiLKnzWo8Wwsf5bZfbvu7//a9oTYoqD/fWpe96NuHkoS9h0ccGOTe0C4NGXdtS0iObOw==}
 
@@ -728,13 +793,29 @@ packages:
   html-void-elements@3.0.0:
     resolution: {integrity: sha512-bEqo66MRXsUGxWHV5IP0PUiAWwoEjba4VCzg0LjFJBpchPaTfyfCKTG6bc5F8ucKec3q5y6qOdGyYTSBEvhCrg==}
 
+  is-extendable@0.1.1:
+    resolution: {integrity: sha512-5BMULNob1vgFX6EjQw5izWDxrecWK9AM72rugNr0TFldMOi0fj6Jk+zeKIt0xGj4cEfQIJth4w3OKWOJ4f+AFw==}
+    engines: {node: '>=0.10.0'}
+
+  is-fullwidth-code-point@3.0.0:
+    resolution: {integrity: sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==}
+    engines: {node: '>=8'}
+
   is-what@5.5.0:
     resolution: {integrity: sha512-oG7cgbmg5kLYae2N5IVd3jm2s+vldjxJzK1pcu9LfpGuQ93MQSzo0okvRna+7y5ifrD+20FE8FvjusyGaz14fw==}
     engines: {node: '>=18'}
 
+  js-yaml@3.14.2:
+    resolution: {integrity: sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==}
+    hasBin: true
+
   json-schema@0.4.0:
     resolution: {integrity: sha512-es94M3nTIfsEPisRafak+HDLfHXnKBhV3vU5eqPcS3flIWqcxJWgXHXiey3YrpaNsanY5ei1VoYEbOzijuq9BA==}
 
+  kind-of@6.0.3:
+    resolution: {integrity: sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw==}
+    engines: {node: '>=0.10.0'}
+
   magic-string@0.30.21:
     resolution: {integrity: sha512-vd2F4YUyEXKGcLHoq+TEyCjxueSeHnFxyyjNp80yg0XV4vUhnDer/lvvlqM/arB5bXQN5K2/3oinyCRyx8T2CQ==}
 
@@ -811,6 +892,10 @@ packages:
   regex@6.1.0:
     resolution: {integrity: sha512-6VwtthbV4o/7+OaAF9I5L5V3llLEsoPyq9P1JVXkedTP33c7MfCG0/5NOPcSJn0TzXcG9YUrR0gQSWioew3LDg==}
 
+  require-directory@2.1.1:
+    resolution: {integrity: sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==}
+    engines: {node: '>=0.10.0'}
+
   rfdc@1.4.1:
     resolution: {integrity: sha512-q1b3N5QkRUWUl7iyylaaj3kOpIT0N2i9MqIEQXP73GVsN9cw3fdx8X63cEmWhJGi2PPCF23Ijp7ktmd39rawIA==}
 
@@ -819,9 +904,20 @@ packages:
     engines: {node: '>=18.0.0', npm: '>=8.0.0'}
     hasBin: true
 
+  rxjs@7.8.2:
+    resolution: {integrity: sha512-dhKf903U/PQZY6boNNtAGdWbG85WAbjT/1xYoZIC7FAY0yWapOBQVsVrDl58W86//e1VpMNBtRV4MaXfdMySFA==}
+
   search-insights@2.17.3:
     resolution: {integrity: sha512-RQPdCYTa8A68uM2jwxoY842xDhvx3E5LFL1LxvxCNMev4o5mLuokczhzjAgGwUZBAmOKZknArSxLKmXtIi2AxQ==}
 
+  section-matter@1.0.0:
+    resolution: {integrity: sha512-vfD3pmTzGpufjScBh50YHKzEu2lxBWhVEHsNGoEXmCmn2hKGfeNLYMzCJpe8cD7gqX7TJluOVpBkAequ6dgMmA==}
+    engines: {node: '>=4'}
+
+  shell-quote@1.8.3:
+    resolution: {integrity: sha512-ObmnIF4hXNg1BqhnHmgbDETF8dLPCggZWBjkQfhZpbszZnYur5DUljTcCHii5LC3J5E0yeO/1LIMyH+UvHQgyw==}
+    engines: {node: '>= 0.4'}
+
   shiki@3.21.0:
     resolution: {integrity: sha512-N65B/3bqL/TI2crrXr+4UivctrAGEjmsib5rPMMPpFp1xAx/w03v8WZ9RDDFYteXoEgY7qZ4HGgl5KBIu1153w==}
 
@@ -836,13 +932,36 @@ packages:
     resolution: {integrity: sha512-1POYv7uv2gXoyGFpBCmpDVSNV74IfsWlDW216UPjbWufNf+bSU6GdbDsxdcxtfwb4xlI3yxzOTKClUosxARYrQ==}
     engines: {node: '>=0.10.0'}
 
+  sprintf-js@1.0.3:
+    resolution: {integrity: sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==}
+
+  string-width@4.2.3:
+    resolution: {integrity: sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==}
+    engines: {node: '>=8'}
+
   stringify-entities@4.0.4:
     resolution: {integrity: sha512-IwfBptatlO+QCJUo19AqvrPNqlVMpW9YEL2LIVY+Rpv2qsjCGxaDLNRgeGsQWJhfItebuJhsGSLjaBbNSQ+ieg==}
 
+  strip-ansi@6.0.1:
+    resolution: {integrity: sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==}
+    engines: {node: '>=8'}
+
+  strip-bom-string@1.0.0:
+    resolution: {integrity: sha512-uCC2VHvQRYu+lMh4My/sFNmF2klFymLX1wHJeXnbEJERpV/ZsVuonzerjfrGpIGF7LBVa1O7i9kjiWvJiFck8g==}
+    engines: {node: '>=0.10.0'}
+
   superjson@2.2.6:
     resolution: {integrity: sha512-H+ue8Zo4vJmV2nRjpx86P35lzwDT3nItnIsocgumgr0hHMQ+ZGq5vrERg9kJBo5AWGmxZDhzDo+WVIJqkB0cGA==}
     engines: {node: '>=16'}
 
+  supports-color@7.2.0:
+    resolution: {integrity: sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==}
+    engines: {node: '>=8'}
+
+  supports-color@8.1.1:
+    resolution: {integrity: sha512-MpUEN2OodtUzxvKQl72cUF7RQ5EiHsGvSsVG0ia9c5RbWGL2CI4C7EpPS8UTBIplnlzZiNuV56w+FuNxy3ty2Q==}
+    engines: {node: '>=10'}
+
   swr@2.3.8:
     resolution: {integrity: sha512-gaCPRVoMq8WGDcWj9p4YWzCMPHzE0WNl6W8ADIx9c3JBEIdMkJGMzW+uzXvxHMltwcYACr9jP+32H8/hgwMR7w==}
     peerDependencies:
@@ -859,9 +978,16 @@ packages:
     resolution: {integrity: sha512-j2Zq4NyQYG5XMST4cbs02Ak8iJUdxRM0XI5QyxXuZOzKOINmWurp3smXu3y5wDcJrptwpSjgXHzIQxR0omXljQ==}
     engines: {node: '>=12.0.0'}
 
+  tree-kill@1.2.2:
+    resolution: {integrity: sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==}
+    hasBin: true
+
   trim-lines@3.0.1:
     resolution: {integrity: sha512-kRj8B+YHZCc9kQYdWfJB2/oUl9rA99qbowYYBtr4ui4mZyAQ2JpvVBd/6U2YloATfqBhBTSMhTpgBHtU0Mf3Rg==}
 
+  tslib@2.8.1:
+    resolution: {integrity: sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==}
+
   undici-types@6.21.0:
     resolution: {integrity: sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==}
 
@@ -954,6 +1080,10 @@ packages:
       typescript:
         optional: true
 
+  wrap-ansi@7.0.0:
+    resolution: {integrity: sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==}
+    engines: {node: '>=10'}
+
   ws@8.19.0:
     resolution: {integrity: sha512-blAT2mjOEIi0ZzruJfIhb3nps74PRWTCz1IjglWEEpQl5XS/UNama6u2/rjFkDDouqr4L67ry+1aGIALViWjDg==}
     engines: {node: '>=10.0.0'}
@@ -966,6 +1096,18 @@ packages:
       utf-8-validate:
         optional: true
 
+  y18n@5.0.8:
+    resolution: {integrity: sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==}
+    engines: {node: '>=10'}
+
+  yargs-parser@21.1.1:
+    resolution: {integrity: sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==}
+    engines: {node: '>=12'}
+
+  yargs@17.7.2:
+    resolution: {integrity: sha512-7dSzzRQ++CKnNI/krKnYRV7JKKPUXMEh61soaHKg9mrWEhzFWhFnxPxGl+69cD1Ou63C13NUPCnmIcrvqCuM6w==}
+    engines: {node: '>=12'}
+
   zod@4.3.5:
     resolution: {integrity: sha512-k7Nwx6vuWx1IJ9Bjuf4Zt1PEllcwe7cls3VNzm4CQ1/hgtFUK2bRNG3rvnpPUhFjmqJKAKtjV576KnUkHocg/g==}
 
@@ -1518,16 +1660,52 @@ snapshots:
       '@algolia/requester-fetch': 5.46.3
       '@algolia/requester-node-http': 5.46.3
 
+  ansi-regex@5.0.1: {}
+
+  ansi-styles@4.3.0:
+    dependencies:
+      color-convert: 2.0.1
+
+  argparse@1.0.10:
+    dependencies:
+      sprintf-js: 1.0.3
+
   birpc@2.9.0: {}
 
   ccount@2.0.1: {}
 
+  chalk@4.1.2:
+    dependencies:
+      ansi-styles: 4.3.0
+      supports-color: 7.2.0
+
   character-entities-html4@2.1.0: {}
 
   character-entities-legacy@3.0.0: {}
 
+  cliui@8.0.1:
+    dependencies:
+      string-width: 4.2.3
+      strip-ansi: 6.0.1
+      wrap-ansi: 7.0.0
+
+  color-convert@2.0.1:
+    dependencies:
+      color-name: 1.1.4
+
+  color-name@1.1.4: {}
+
   comma-separated-tokens@2.0.3: {}
 
+  concurrently@9.2.1:
+    dependencies:
+      chalk: 4.1.2
+      rxjs: 7.8.2
+      shell-quote: 1.8.3
+      supports-color: 8.1.1
+      tree-kill: 1.2.2
+      yargs: 17.7.2
+
   copy-anything@4.0.5:
     dependencies:
       is-what: 5.5.0
@@ -1540,6 +1718,8 @@ snapshots:
     dependencies:
       dequal: 2.0.3
 
+  emoji-regex@8.0.0: {}
+
   entities@7.0.0: {}
 
   esbuild@0.27.2:
@@ -1571,10 +1751,18 @@ snapshots:
       '@esbuild/win32-ia32': 0.27.2
       '@esbuild/win32-x64': 0.27.2
 
+  escalade@3.2.0: {}
+
+  esprima@4.0.1: {}
+
   estree-walker@2.0.2: {}
 
   eventsource-parser@3.0.6: {}
 
+  extend-shallow@2.0.1:
+    dependencies:
+      is-extendable: 0.1.1
+
   fdir@6.5.0(picomatch@4.0.3):
     optionalDependencies:
       picomatch: 4.0.3
@@ -1586,6 +1774,17 @@ snapshots:
   fsevents@2.3.3:
     optional: true
 
+  get-caller-file@2.0.5: {}
+
+  gray-matter@4.0.3:
+    dependencies:
+      js-yaml: 3.14.2
+      kind-of: 6.0.3
+      section-matter: 1.0.0
+      strip-bom-string: 1.0.0
+
+  has-flag@4.0.0: {}
+
   hast-util-to-html@9.0.5:
     dependencies:
       '@types/hast': 3.0.4
@@ -1610,10 +1809,21 @@ snapshots:
 
   html-void-elements@3.0.0: {}
 
+  is-extendable@0.1.1: {}
+
+  is-fullwidth-code-point@3.0.0: {}
+
   is-what@5.5.0: {}
 
+  js-yaml@3.14.2:
+    dependencies:
+      argparse: 1.0.10
+      esprima: 4.0.1
+
   json-schema@0.4.0: {}
 
+  kind-of@6.0.3: {}
+
   magic-string@0.30.21:
     dependencies:
       '@jridgewell/sourcemap-codec': 1.5.5
@@ -1691,6 +1901,8 @@ snapshots:
     dependencies:
       regex-utilities: 2.3.0
 
+  require-directory@2.1.1: {}
+
   rfdc@1.4.1: {}
 
   rollup@4.55.2:
@@ -1724,8 +1936,19 @@ snapshots:
       '@rollup/rollup-win32-x64-msvc': 4.55.2
       fsevents: 2.3.3
 
+  rxjs@7.8.2:
+    dependencies:
+      tslib: 2.8.1
+
   search-insights@2.17.3: {}
 
+  section-matter@1.0.0:
+    dependencies:
+      extend-shallow: 2.0.1
+      kind-of: 6.0.3
+
+  shell-quote@1.8.3: {}
+
   shiki@3.21.0:
     dependencies:
       '@shikijs/core': 3.21.0
@@ -1743,15 +1966,37 @@ snapshots:
 
   speakingurl@14.0.1: {}
 
+  sprintf-js@1.0.3: {}
+
+  string-width@4.2.3:
+    dependencies:
+      emoji-regex: 8.0.0
+      is-fullwidth-code-point: 3.0.0
+      strip-ansi: 6.0.1
+
   stringify-entities@4.0.4:
     dependencies:
       character-entities-html4: 2.1.0
       character-entities-legacy: 3.0.0
 
+  strip-ansi@6.0.1:
+    dependencies:
+      ansi-regex: 5.0.1
+
+  strip-bom-string@1.0.0: {}
+
   superjson@2.2.6:
     dependencies:
       copy-anything: 4.0.5
 
+  supports-color@7.2.0:
+    dependencies:
+      has-flag: 4.0.0
+
+  supports-color@8.1.1:
+    dependencies:
+      has-flag: 4.0.0
+
   swr@2.3.8(react@19.2.3):
     dependencies:
       dequal: 2.0.3
@@ -1767,8 +2012,12 @@ snapshots:
       fdir: 6.5.0(picomatch@4.0.3)
       picomatch: 4.0.3
 
+  tree-kill@1.2.2: {}
+
   trim-lines@3.0.1: {}
 
+  tslib@2.8.1: {}
+
   undici-types@6.21.0: {}
 
   unist-util-is@6.0.1:
@@ -1880,8 +2129,28 @@ snapshots:
       '@vue/server-renderer': 3.5.27(vue@3.5.27)
       '@vue/shared': 3.5.27
 
+  wrap-ansi@7.0.0:
+    dependencies:
+      ansi-styles: 4.3.0
+      string-width: 4.2.3
+      strip-ansi: 6.0.1
+
   ws@8.19.0: {}
 
+  y18n@5.0.8: {}
+
+  yargs-parser@21.1.1: {}
+
+  yargs@17.7.2:
+    dependencies:
+      cliui: 8.0.1
+      escalade: 3.2.0
+      get-caller-file: 2.0.5
+      require-directory: 2.1.1
+      string-width: 4.2.3
+      y18n: 5.0.8
+      yargs-parser: 21.1.1
+
   zod@4.3.5: {}
 
   zwitch@2.0.4: {}
diff --git a/server.js b/server.js
index 6520dc83..b81bdb89 100644
--- a/server.js
+++ b/server.js
@@ -1,6 +1,8 @@
 // @ts-check
 import { WebSocketServer } from 'ws';
 import { readFileSync, mkdirSync, writeFileSync } from "fs";
+import { join as joinPath } from 'path'
+import matter from 'gray-matter';
 
 const PORT = 8080
 
@@ -12,10 +14,11 @@ wss.on('connection', (ws) => {
   console.log('New client connected');
 
   let filename = ''
+  const ROOT_DIR = 'docs';
 
   ws.on('message', (message, isBinary) => {
     if (message instanceof Buffer && isBinary) {
-      writeFileSync(filename, message);
+      writeFileSync(joinPath(ROOT_DIR, filename), message);
 
       return;
     }
@@ -24,37 +27,54 @@ wss.on('connection', (ws) => {
 
     switch (name) {
       case 'download_q': {
-        const { q } = payload;
+        const { q, duration } = payload;
         console.log(`Start ${q}`)
 
+        const q_stem = q.replace(/\.[a-z0-9]+$/, "");
+
         try {
-          mkdirSync(`docs/${q}`);
+          mkdirSync(joinPath(ROOT_DIR, q_stem));
         } catch (e) {}
 
         let outMd = "";
+        let isChanged = false;
 
         const re = /^(?<min>\d{1,2}):(?<sec>\d{2})\s*$/;
         const ts = [];
 
-        for (const line of readFileSync(`docs/${q}.md`, "utf-8").trimEnd().split("\n")) {
+        const { data, content } = matter(readFileSync(joinPath(ROOT_DIR, `${q_stem}.md`), 'utf-8'));
+        data.video = '/' + q;
+
+        for (const line of content.split("\n")) {
           const m = re.exec(line);
           if (m?.groups) {
             const { min, sec } = m.groups;
             const t = `${min}_${sec}`;
             ts.push(t);
             outMd += `\n![${line}](./${q}/${t}.png)\n\n`;
+            isChanged = true;
           } else {
             outMd += `${line}\n`;
           }
         }
 
-        writeFileSync(`docs/${q}.md`, outMd);
+        const interval = data.interval;
+        if (typeof interval === 'number') {
+          for (let t = 0; t < duration; t += interval) {
+            ts.push(t);
+            isChanged = true;
+          }
+        }
 
-        ws.send(JSON.stringify({ name: "seek_q_ts", q, ts }));
+        if (isChanged){
+          writeFileSync(joinPath(ROOT_DIR, `${q_stem}.md`), matter.stringify(outMd, data));
+          ws.send(JSON.stringify({ name: "seek_q_ts", q, ts }));
+        }
       } break;
       case 'timed_q' : {
         const { q, t } = payload;
-        filename = t ? `docs/${q}/${t}.png` : '';
+        const q_stem = q.replace(/\.[a-z0-9]+$/, "");
+        filename = t ? joinPath(q_stem, `${t}.png`) : '';
       } break;
       case 'done' : {
         const { q } = payload