Pretty sure you guys must be knowing about the IDM tool.

Problem: I have a video playing site, only playing videos, no uploading. So the problem is that these videos are made after hours and hours of work and uploaded on the website, only premium members can view the videos, but the problem is that internet download manager can easily download my videos, what to do? how to block it? Please help me with this as my videos are copyrighted.

PS: This is educational website :P