The embed process requires premium account since the embed code is more than 250 characters. Premium gives up to 1000 character typing.
Then it is a matter of grabbing the embed code from the youtube video and simply pasting it into the thread. I will do a tutorial on this tomorrow.
Posting a link from YouTube or 3Speak might work at the secondary level but it gets a bit wonky, especially with other links under the same threadstorm
Clearly, I still have a long way to go :)