Here is an embedded video from YouTube:



If you want to link to a YouTube video, I recommend you use the youtube BBCode tag, although the generic video tag should also work.

For any other videos from other hosting sites (Google video, Yahoo! video, GodTube, Vimeo, and so on), always use the video tag

This is an embedded video from GodTube:



It is really easy. All you have to do is write the full link between the opening and closing tags. Also, notice that you can align the video with the left, center and right tags. They all appear on the posting toolbar for your convenience. Enjoy!