Are John Galt's videos not working for anyone else?
Also, here's a quick refresher on how to embed videos:
Take the url for the video, which should look something like this:
https://www.youtube.com/watch?v=OIYySjIyy_I
And take the mish-mash of letters after the "watch?v=" part and wrap it in the youtube tag, like so:
(youtube)OIYySjIyy_I(/youtube)
Except replace the parenthesis which square brackets: [ ]
If you do it right, it'll look like this: