When Firefox 1 came out, Mozilla decided to hold a contest called Firefox Flicks to promote Firefox. It involved people making short videos to serve as commercials for the then-new Firefox Web browser. The tradition continues on today, and people have come out with some very good ones over the years.
While this one, called “Whee!”, didn’t win first place, it’s well-known as one of the favourites.
If I remember correctly, this one placed second. But I can’t remember who made it.