I'm going to check your urls and see if I can fix it.

Alright it's fixed, if you still don't see the videos, empty your browser cache for the changes to the scripts to refresh. I edited your Transformer blend and it works for me just fine. To fix any blend that is not working just make sure the youtube url is on it's own separate line, otherwise it will not load. Edit your blends as needed and all should be back to normal.