Video with link syntax:
.
[test link](http://example.com/file.webm)
.
<p><a href="http://example.com/file.webm">test link</a></p>
.

Video with link syntax (no text label):
.
[](http://example.com/file.webm)
.
<p><a href="http://example.com/file.webm"></a></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>
.