From the FORUM INFO button above
YouTube Video's : YouTube videos displayed in your post as easy as copying the url and pasting it in the post window (no other formatting needed. This feature should allow you to display videos from many different sites but our early experience is that is sort of hit and miss ... but YouTube works like a champ.
i was able to get a google video up and running...and i think that the movie links in flickr or photobucket work.?.?.?.?
best thing to do is to paste it into a new thread and then hit the Preview button....see if your link works.....if nto then close it...if it does work then hit Post.....