Multimedia Redirection (MMR) not working correctly while using Youtube on some devices.
I'm facing an unusual problem with multimedia redirection (MMR). Since this might be a rare issue to troubleshoot, I hope someone has encountered something similar before.
Working scenario:
A random BYOD laptop connects through a Windows App to an AVD Sessionhost (E16asV5). I can open YouTube.com in Edge on the sessionhost, play embedded and full-screen videos without any problems. The local task manager shows GPU activity. This confirms that MMR is set up correctly and operates as expected.
Non-working scenario:
Corporate devices (Dell OptiPlex with 8GB RAM, Windows 11 Enterprise, Entra Joined, Intune managed) connect to the same AVD sessionhosts as in the working scenario. They open Edge, go to YouTube.com, play an embedded video, but see a gray overlay. However, the local GPU shows activity in the task manager, indicating that MMR is working but the video is not visible. When switching the video to full screen, the video plays fine. Returning to embedded view shows the gray overlay again. YouTube video's run perfectly on the local device..
I've done extensive troubleshooting, probably too much to detail here. Currently, I'm unsure how to isolate the issue and may need to open a ticket with Microsoft. Has anyone seen something like this before? Any guidance or information would be appreciated.