Like large planes on long distance routes (at least) have shown films for decades, and we watched films from discs or cassettes at home before broadband internet.

A movie is only a few GB - you can already store them locally on your phone.

Also even if it was facing upwards, the entire reason why they're using LEO satellites is to get low latency to get network performance similar to what you get with terrestrial service. If you're far away from the Earth then none of that is true.