Researching DRM decryption is legally complex. In the US, the generally prohibits the circumvention of "effective technological measures" used to protect copyrighted works, even for interoperability, unless specific exemptions apply.
Circumventing a technological measure that effectively controls access to a copyrighted work is illegal. This includes bypassing PlayReady decryption. Penalties range from $2,500 to $25,000 per offense, and repeat offenders can face felony charges. playready drm decrypt
If you’re building a player, you generally don't handle the raw decryption yourself—you interface with the browser's Encrypted Media Extensions (EME) 1. Configure your Player Tools like the Video.js DRM plugin Researching DRM decryption is legally complex
The decryption of PlayReady content is a multi-stage process involving the content packager, the license server, and the client player. even for interoperability