3gp, avi, dv, flac, flv, m4a, m4v, mka, mkv, mov, mp3, mp4, mpeg, mpg, oga, ogg, ogv, webm, and wmv.
The description field accepts some HTML formatting: a, abbr, b, blockquote, br, cite, del, em, i, ins, li, ol, p, pre, strong, sub, sup, u, ul