To post a youtube video you firstly hit this icon:
You must be registered for see images
Then these will appear:
[YOUTUBE ][ /YOUTUBE], between them post the link to your youtube video, but
not the whole url only what follows the "="
If for example i want to post this link:
You must be registered for see links
I will do it like this:
[YOUTUBE ] kRLAyG3gKYg [ /YOUTUBE] (without the spaces)
see?