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You should try doing that for the Netflix app. It’ll surely work, because nobody’s ever thought of that hole before!

Unless you want the DRM to limit the delivered resolution to a pretty low point then Windows cannot see into the encrypted video memory, nor can anything in userland.

What if we load our video rip code as a kernel driver? Has this been done to circumvent Windows Netflix DRM?

It doesn't matter because of HDCP.

Isn’t HDCP primarily concerned with transmission of protected content to TVs and such?

If we can load code into the kernel of the device doing the video decode, how can the DRM prevent us from just dumping the data as it’s being decrypted / streamed?

Then you won't have signed drivers so it will fail.

You're being sarcastic but what you said is literally true thanks to the cancer that is HDCP

HDCP is easy enough to downgrade and then remove.