I had a friend who worked at a video store in the 80s and he started this novel program where he would encourage his customers to record messages at the end of the films. There was usually space at the end of a tape where more could be recorded.
People would reenact their favorite scenes or offer reviews or recommendations for other movies. The program was not widespread because it was kind of hard to do but some people really got into it. It was a cool way to encourage a dialogue about film.