Video security: encryption, watermarks and what no player can do

How XAPlayer protects course videos from download and copying, and why a moving watermark is the most important layer against leaks.

The point of protecting course video is to make stealing it hard, costly and traceable. This page says honestly what each layer does.

The layers

• Encryption: every lesson is encrypted with its own key, and downloaded files won’t play without it.
• Device-bound keys: the key is only sent to an activated device, and the browser holds it in a form that can’t be read out.
• Device limits: each license works on a set number of devices.
• Moving watermark: the buyer’s name or phone keeps moving across the picture, and hiding it stops playback.
• Allowed domains: the embedded player only shows on your sites.

What no player can do

No software can stop someone filming the screen with another phone. That is why the watermark matters most: if a video leaks, the name or number on it shows which license it came from, and you can revoke that license.