Betamax and VHS formats were developed by Sony and their engineers decided that Beta was the better format (as it had a wider tape) and they sold the rights to VHS to JVC - who then marketed it as their own. The one glaring problem was that Beta could barely fit one hour of video onto a tape yet the VHS format could easily squeeze 3 hours onto a tape. The rest is history - Beta died a quick death and VHS took off.
In their efforts to make smaller camera's utilizing the VHS format, they designed a smaller tape (VHS-C) which fit inside an adapter that was the size and shape of a full VHS tape. When my son was born in 1990 I bought my first video camera that took a full sized VHS tape. I looked like the CityPulse News-guy with the battery packs I had to lug around with that camera and it sat on my shoulder while I was taping.