3g2, 3gp, divx, dv, dvx, flac, flv, m4a, m4v, mov, mp3, mp4, mpeg, mpg, ogg, qt, srt, vob, wmv, and xml.
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