Unlike a lot of forums our forum will allow you to post videos as soon as you're registered. Posting a video is simple and involves the "Flash" button above the text box. What you will need to know if the width and height of the video you want to embed and also the video's html address.

When you press the "Flash" button you will see this bbcode appear in the text box:
Code:
[flash=][/flash]
From there you just need to plug the information in like so:
Code:
[flash=width,height]video url[/flash]
So if I wanted to embed this video the code I would use is:
Code:
[flash=425,344]http://www.youtube.com/v/Q_DmozuBDps&hl=en&fs=1[/flash]
For YouTube videos it's really easy because the height and width are available in the link you'd use to embed a video on a blog, for example. I'm not sure how other sites work but if you have any questions let me know!