From the Youtube page:
This is Max Frost and The Troopers video of their hit song "The Shape Of Things To Come". Max Frost and The Troopers were a fictional rock group made up for the 60's movie Wild In The Streets. This was their big hit taken from the movie. The movie was about a young man named Max Frost who supports a senator played by Hal Holbrook. Max wants to lower the voting age to 14. He gets elected as president of the USA and ends up banishing all old people to camps where they are fed LSD.