if you want to post a video from a site like youtube, all you have to do is copy the url and put them around video tags like this:

Code:

[video]http://www.youtube.com/watch?v=Kr_wnLd3GU4[/video]

here is a list of video sites that suppose to work with the embed tag: animeepisodes, biku, bofunk, break, clip.vn, clipfish, clipshack, collegehumor, current, dailymotion, downloadfestival, fliptrack, gametrailers, gamevideos, glumbert, gmx, google, googlyfoogly, ifilm, jumpcut, kewego, liveleak, livevideo, megavideo, metacafe, mofile, multiply, myspace, myvideo, quxiu, revver, sevenload, sharkle, spikedhumor, stage6, stickam, streetfire, toufee, tudou, unf-unf, uume, veoh, videoclipsdump, videojug, videotube, vidiac, vidilife, vimeo, wangyou, web.de, wideo.fr, youtube