On IE7 the start screen appears forever

[feklee]

I.e. the content never gets unhidden. The problem seems to be that the iframe API doesn't support IE7:

https://groups.google.com/d/msg/youtube-api-gdata/fTZEy0wP0i0/Xalo5JCovP4J

Solution: Show an error message instead. If possible use feature detection to find out whether it works with IE7. Perhaps the YouTube player generates an error event or some such thing.