update markdown examples

README.md

@@ -27,30 +27,33 @@ For example:
 The markdown file content can be:
 
 **Option A: YAML Frontmatter (for auto-generating timestamps)**
-```yaml
+
+```markdown
 ---
 interval: 5
 dedup: true
 ---
 
-Your content here...
+<!-- Markdown content here can be left empty -->
 ```
 
 - `interval`: Interval in seconds to auto-generate timestamps
 - `dedup`: (Optional) Set to `true` to remove similar screenshots (defaults to 0.005), or specify a custom threshold value
 
 **Option B: Manual Timestamps**
-```markdown
----
----
 
-Content with timestamps...
+```markdown
+<!-- Frontmatter is optional -->
+<!-- Content with timestamps... -->
 
 1:30
+Mi habitasse hendrerit id tincidunt finibus eleifend dolor aliquet erat egestas.
 
 2:45
+Semper pretium donec laoreet convallis accumsan habitasse.
 
 5:00
+Velit euismod blandit proin arcu magna.
 ```
 
 Timestamps should be in `M:SS` or `MM:SS` format on their own line. They will be converted to timestamped screenshot references.