How to create a video hosting for online cinemas?

Question

fmpeg

Node.js ffmpeg video playback control over socket. I want to close access to a static file. feed data through a socket server to node.js in order to show ads at 30 50 80% during the movie. and display the link "go to the advertiser's site" ?
Also make the video download from the position of the rewind slider. Uploading video from the moment where the person stopped (save to the session where they stopped)