To all those who asked for more information on the previous Nerdtastic production, here 'tis:
The video is from YouTube, searchable under 'a capella tribute to John Williams', and was produced by a young man by the name of 'Corey Vidal'. He is lip synching all four parts of a song done by the humorous a capella group Moosebutter ("We sound like baldness feels"), whose songs you can hear on their website. I'm pretty sure they wish the were from Canada. Go judge for yourself!