Does VOD Support the Function of Only Watching Videos on CloudSite But Not Downloading Them?

To prevent video leakage and link theft, the VOD service supports HLS video encryption. Encrypted videos cannot be distributed to others even if malicious users download them. Currently, only FLV and MP4 videos can be uploaded on PCs to CloudSite, and only MP4 videos can be uploaded on mobile devices. Therefore, the function of watching videos but not downloading videos cannot be implemented.