Same here. Interestingly enough Youtube Vanced is 120hz. So it seems like Google is limiting it somewhere in the code or there's a simple way of enabling 120hz either.
I was testing some HDR10 recordings from the main sensor using Pro mode in the default camera app. While reviewing the clips in the stock gallery app, I noticed that HDR metadata are applied while on portrait, but aren't while on landscape, leaving me with a pretty washed out result.
To support...