the crazy 10-hour vhs format nobody thinks exists
Video Home System, as in VHS, is something I used a lot from the time I was a little kid all the way up until the 2000s.
In the early 80s, the family did start off with Betamax, but that didn't last long because it was obvious that VHS was taking over, and the switch was made to VHS. That's the format I used for a really long time to watch my movies on.
Pictured above is what the Motion Pictures Association of America, a.k.a. the MPAA, used to use for its rating system. It's at the bottom. The "X" rating. This is what used to be used before the introduction of NC-17.