From the YouTube description:
Germany 1970. The German moderator discuss in the beginning how boring and lame the official looks are and that the fashion and color designers came up with the following outfits to make the game more interesting and colorful. They explain very detailed the colors since at the point many did not have color tv!
Clearly they made my day with the ideas. I just keep cracking up! I have no clue why they dance so madly. latin music dancing models with soccer fashion without shoes. but even Guenther thinks that the trikot needs an update as a service and entertainment for the fans who watch soccer games
OK, from a design point of view I have to say I love the new 1970 jerseys, but I too have no clue why they dance so madly. See also this recent remix of this video.