Copyright in online cinema, how to avoid problems?

Question

Copyright

I decided to make an online cinema and fill it with films from vk, ok and other sites. The site will be in .ru and will be hosted on a home server. What copyright problems can arise and how can they be avoided? I see the situation like this: in theory, if I don’t have content (movies) on the server, and I just provide a showing of a movie from another site, then there shouldn’t be any complaints. Naturally, if the copyright holders ask to remove the film from the screening, I will go to a meeting. But exactly until the moment when it becomes possible and meaningful to transfer the service and Runet.