add video and some fixes

docs/.vitepress/theme/components/Downloader.vue

@@ -24,7 +24,7 @@ function onSubmit(ev: SubmitEvent) {
   ev.preventDefault();
   if (!q.value) return;
 
-  const src = "/" + q.value;
+  const src = "/" + encodeURIComponent(q.value);
   const isSameSrc = videoSrc.value === src;
   videoSrc.value = src;