For embedding pics press
button , paste url under "please enter url of yr image".Then click OK.
For you tube copy paste every thing after watch?v=
suppose you want to embed http://www.youtube.com/watch?v=eRuahPZc_E8
you will just copy paste eRuahPZc_E8 between [*youtube][/youtube](remove "*" from the code)
[*youtube]eRuahPZc_E8[/youtube](remove "*" from the code again)