http://www.youtube.com/watch?v=3FsVeMz1F5c&fmt=18 for HQ VIDEO WITH STEREO SOUND.
35 years to this day (6th April 1974) ABBA won with this performance of Waterloo. Enjoy!

More information on this clip can be found here -

http://www.abbaontv.com/1974/description-euro-song-contest74.html