It's nice. A real trip down memory lane. You tube has a lot of retro commercials also. They also have commercials from other countries. I especially like UK and Australian commercials.
YouTube has a lot of old ads, of course, and some promo films for certain things. Some broadcasts last nearly an hour, if one has loads of time to kill. I wish someone would assemble promo films and pre 1974 ads for The Magnavox Company.