And it turns out that nothing can be done? For some reason, it works for everyone, but something happened to me and it doesn't work anymore.

moved to tvboxes

Just out of curiosity, you are trying to play content that is encoded in AV1. Are you sure that your device is equipped with an AV1 decoder IP and that the kernel has the appropriate driver?

The seller can't help me and sends me to technical support. Technical support sends me to this forum. I bought it here. https://www.ozon.ru/product/tsentr-hab-umnogo-doma-home-assistant-4-64-zigbee-ble-hub-1657561166/

I started building mesa 25.2 according to https://docs.mesa3d.org/install.html When I started meson, it complained about meson-1.0.1 is too old (Bookworm)... needs 1.4.0 Trixie will provide meson 1.7... is this what you did? Start with a self built Armbian-Trixie? When you type "replace the libs", do you mean to uninstall debian package, and install the just compiled source? libva2 - Video Acceleration (VA) API for Linux -- runtime Is this independent from ffmpeg (I only see libav in ffmpeg, not libva) Does mpv need any special configuration?