I do not watch movies; was forced to watch 3 movies, since there was heavy traffic and we were in bus for more than 8 hours. They can leave some time gap, sense the passengers' attitudes and (easily judge that majority disliked seeing so immediately next movie) leave it, if no one asked. Or the operator can ask the mejority's opinion on seeing movies. You can not ask this option while booking, since at that time many non-movie-goers will say "NO", but may like watching while travelling. Quiet musing may be good for all, including the bus operators.