I've done a lot of searching and cannot find a definitive answer as to why some YouTube videos won't play on my iPod Touch 4g. For example: http://www.youtube.com/watch?v=3rCp2DZQElo clicking that link opens up the YouTube app but the video dies not play. I get a "Could not load movie" message. I get this error more often than I would like. These are short videos usually around 3 minutes, have been uploaded for some time, and happens with about 20% of the videos I try to play. Does the video play for you on your iPod / iPad? Do you have a workaround for when this happens?