YTTM is a free to use website that catalogues and organizes youtube videos from the 60s, 70s, 80s, up to today. It works in a very simple way. You are provided with a slider that acts as a timeline. You can move the slider on this timeline to the available years. The site then shuffles the videos available from that year and provides a random video.
The shuffling can be managed by certain options that let you include or exclude video games, television, commercials, etc. To reshuffle and play another video, you simply click a button on the right pane.