I think it would be a good addition to be able to embed youtube videos.
We’ve had that feature on our forums for a while now and it’s really cool, i’ve no idea how it’s implemented though, since all i do there is getting rid of the occasional ad bot; but i’m sure you guys know more than i do 
embed youtube videos
trigg3r
(trigg3r)
#1
light_sh4v0r
(light_sh4v0r)
#2
I’m not sure I would like that tbh, usually gets abused for a lot of useless stuff.