I've been trying to figure it out, but apparently im a bit of a derp. I used to do it by pasting Youtubes Old script into the HTML script when creating a topic - but Youtube ended the old embedding script support.
So I have to ask, how do we do it now? and...Why isnt there a media insert button for OP's anyway?
...uhh...ill just put my favorite quote of all time here.
"Welcome to Pain, the second of three...You have dealt the first...now deal with me!!"