Does Xperia 1 not support 4K video on Youtube?

[SonyPhoneRocks]

Same 4K clip can play as 2160P on Xperia XZ Premium but not Xperia 1

[Uliwooly]

@SonyPhoneRocks 

This has been asked before, sadly this is not up to Sony but in this case YouTube 

I've just tested this and there's an option to play videos at 2160p 

[SonyPhoneRocks]

Thank you! I was testing the phone in BestBuy, and realized they didn't install latest update. Once instalked, 2160P showed up as an option.

[Sensination]

My YouTube plays videos in 4k without any issues (also without any adverts  )