Apple TV 4K (14.0.2) with SONY 65 ”950G, YouTube can play 4K content. TVOS and the YouTube app were updated automatically.
Apple TV 4K (14.0.2) with Sony 85 ”950H, YouTube can only play 1080p. I updated TVOs and the YouTube app manually. A few minutes ago, I reset Apple TV and installed YouTube, still not 4K content.
Same network, both wires are connected to the router.