Soooo, after a few evenings of work, I've 100% broken Widevine L3 DRM. Their Whitebox AES-128 implementation is vulnerable to the well-studied DFA attack, which can be used to recover the original key. Then you can decrypt the MPEG-CENC streams with plain old ffmpeg...
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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