Summary: Check the URLs to your JS files on the page and the error will disappear.…Although it does mention the JS file that's missing, it makes it seem like the missing JS file is being loaded and has an issue on its first line?…Confusing?
Summary: Yeah, the Youtube Player Demo is having an error!…Not a good sign.!…Update 3: Back up?
Summary: If there are some things that look like they're missing, it's because they are.…I was forced to push updates out that weren't entirely ready..…but whatever.