You can add watch party feature same as Amazon Prime Video watch party where people can watch together and if someone pauses it get paused for everyone and if someone moves it forward or backward it does for everyone. And everybody has control over video, but we can add additional feature like we can restrict the control to selected people.

My name is Yash. I really loved your concept. I am Crypto tech enthusiast from 2012 and would love to contribute to blockchain technology.