If HDMI screen rips aren't good enough for you pirates, DeCENC is another way to beat web video DRM

The article describes DeCENC, a proof-of-concept technique that undermines the Common Encryption Scheme (CENC) used by major streaming services by tricking the Content Decryption Module (CDM) into producing decrypted-but-compressed video output that can be captured and recombined into a clean copy; the researcher published code and attributes the issue to encryption without authentication and fragmented specifications, while also noting the approach is fiddly and less practical than other content-ripping methods.