yea when ur just about to post click youtube button just above simley faces then go to youtube and copy and paste the link just the code like if u got this http://youtube.com/watch?v=Xj8Xo-EJZx4 u only want Xj8Xo-EJZx4 this bit of it then just copy and paste that code in middle and ur all ready to go

[youtube=425,350][/youtube] so u just post code in middle of that with the code Xj8Xo-EJZx4