Just post the YouTube video link using the tags like below:
Code:
[youtube]https://www.youtube.com/watch?v=1cwSdaLQJ7c[/youtube]
There is also a tab you can click on that will insert the youtube tags for you, all you need to do is put the youtube video link between them.
Will look like this:
DO NOT DISABLE BBCODE IN YOUR POST OR VIDEOS WILL NOT SHOW UP.