Playback Issues - Audio/Video & Power

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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Level 7

No rear sound on youtube

I found another 4200x, but this one does not support atmos, and no sound out of surround speakers. This is watching the Atmos Demo on youtube. Tried the firestick and it worked fine.
Roku is connected to my pioneer vsx-1131 AV via HDMI 2.2
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