For those who are not sure on how to use the forum for things like color, bigger text, videos e.t.c here on the forum I'm going to give a rough explanation what works best.
For videos youtube links are automatic now so it should load it at a normal 450 -550 width but if u want to make it bigger thats fine.
For bigger text put your tags [ big ][ big ] [/ big ][ /big ] <--insert text inbetween leave spaces out then you'll be big like me :D
[ bgcolor=#000 ] [/bgcolor ] for color around your text inset text inbetween , close gaps as before.
[ font=Verdana] [/font ] same as above close gaps
hope this helps, try and keep code seperate on one line away from text. The rest of the bb code is pretty straight forward.