with macOS Big Sur 11.5.2, using AirPlay, I can't see video when streaming, just hear sound.
I can't use AirPlay with my Mac, no video just hear sound.
MacBook Pro 15″, macOS 11.5
The support article you came here from should provide you with the steps needed to try to resolve this issue. Have you tried them all yet? If so, and they didn't help, I suggest that you contact Apple Support directly. To do so, simply select the "Get Support" link in the upper right-hand side of this forum's web page.