Video with link syntax:
.
[test link](http://example.com/file.webm)
.
<p><video controls preload="metadata">
<source type="video/webm" src="http://example.com/file.webm"></source>
Your browser does not support playing HTML5 video. You can <a href="http://example.com/file.webm" download>download a copy of the video file</a> instead.
Here is a description of the content: test link
</video></p>
.

Video with link syntax (no text label):
.
[](http://example.com/file.webm)
.
<p><video controls preload="metadata">
<source type="video/webm" src="http://example.com/file.webm"></source>
Your browser does not support playing HTML5 video. You can <a href="http://example.com/file.webm" download>download a copy of the video file</a> instead.
</video></p>
.

Check usual link is not broken:
.
[test link](http://example.com/file.php)
.
<p><a href="http://example.com/file.php">test link</a></p>
.