Some videos won't play on Onn TV 4K Pro streaming box

I also have the ONN GTV 4K Pro, and attempting to get everything Direct Playing. So far the only problems I’ve noticed are with some AV1 videos. I’m similarly suspecting “something” is wrong with encoding settings. However, Jellyfin plays them fine (with same Android ExoPlayer?) so I’m not sure what it going on exactly. I don’t think I’ve tried any interlaced (nicely spotted @Volts).