I can confirm this issue does indeed exist. Issue is with Intel's decoding of Copy One (0x02) MPEG4 Encoded streams provided over Cable Card tuners. I have a Intel NUC NUC6i55SYH running Iris 540 graphics and driver version 20.10.15.4501 on Windows 7 SP1 64Bit, and get the video error consistently on protected Live TV streams. Using a much older NV graphics Card. Error is "Display driver error" and then "The video playback device does not support playback of protected content."
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