We just installed a nice plugin for Vbulletin that allows you to simply put the URL of a video you'd like to post on the forums, instead of using any special forum tags.
Here is a list of video sites this works with:
So just post the URL of your video and watch with amazement as it neatly embeds it in your post. Then stand up, bend over and kick yourself in the nards for this being a remotely cool thing in your life...it's a forum plugin you geek, go outside and do something!!