<a href="http://example.com/path/to/audio-or-video.mp4">Example audio or video</a>
If you write a link like above, Link2Player replaces it with jPlayer.
.m4a .mp3 .ogg .oga .fla .wav .webma
.m4v .mp4 .flv .ogv .webmv .webm
Playable or not belongs to browser accessing your blog. mp3, m4a, m4v, mp4 may be playable in most browsers.