bucknaked

I had this plan on utilizing the Radxa Rock 5 ITX+ as a Moonlight client device to stream games from my desktop computer to my living room TV, and using my 8BitDo Ultimate controller to play. On paper, the board has all the bells and whistles needed to do it, but I am having trouble getting hardware decoding of H264 and/or HEVC to work as expected. From what I gather, I need mesa-vpu support, but the documentation I find is very scattered, and repositories that once held the needed resources are no longer available. I am currently running Armbian_25.DBhsHKsx.2.2_Rock-5-itx_bookworm_vendor_6.1.99_cinnamon-backported-mesa_desktop.img (build date 21st of February, 2025), downloaded from Armbian.com. Hardware decoding does however not work, despite it being marked with "backported mesa". I've been at this for two weeks now with different images, including Armbian and Radxa OS, even going so far as trying to build Armbian myself from scratch. The image I am currently using is however the most stable I have experienced so far. Am I missing something? How do I get hardware decoding to work? Edit: Link to armbianmonitor output