to begin, the actual youtube video id is the only element that needs to be used. this is inserted between the start [youtube] bbcode and the end [/youtube] bbcode. the full youtube uri is not needed. (the use of only the youtube video id is a security measure.)
- full youtube uri: http://www.youtube.com/watch?v=FPGSs56lZEQ
- youtube video id: FPGSs56lZEQ
so, taking the example above, you could do the following:
- click the youtube tag: [youtube] [/youtube]
- paste the full youtube uri: [youtube] http://www.youtube.com/watch?v=FPGSs56lZEQ [/youtube]
- delete the extra bits: [youtube] FPGSs56lZEQ [/youtube]
- submit your post.
feel free to ask any questions you may have regarding this bbcode in this thread.