The problem is - there are three sides to every story. So any accusations will likely be countered. Even though there is evidence of un professionalism (the video), it doesn’t mean their actions are not legal.
No matter, it will likely take time to sort that OP doesn’t have.
Maybe the best thing to do is to tell them you want to leave as it’s not working out and ask for their help?
My concern here is time. If your son is having roommate issues, you don’t want that to persist.