@acf LOL just the other day I was resetting a bunch of old Apple TVs and had cause to rediscover the incantations for “reboot the device from the remote” and the more unusual and necessary “reset to 1080p HD from the remote”. Apple TV set to 4K HDR is 100% unusable when connected to a 4K non-HDR TV! I was glad for the engineers adding this latter reset option.
@mo https://support.apple.com/en-gb/guide/tv/atvbb8553426/tvos