Oh Lordy ..
1) Read the FAQ
2) Google search how to post video on a vBulletin forum
3) Search this for 'how do I post videos' threads
4) Investigate the toolbars given
5) Click the film strip icon then copy and paste your link into iit or
6) Use the [video(]) tag, paste your link, then close the video tag eg [/video(])
I'm guessing you're trying to use a HTML embed code? Just use the link with no tags or quotation marks, biscuit.
Sorry for sounding mean again but people keep asking and other people keep answering.. Again.