YouTube 4k videos aren't showing in 4k

[Samsung_SQA10Yc]

So, I was wondering on YouTube why 4k videos weren't playing in 4k. Is that because the s10 doesn't have a 4k display?

[G4ost]

Since the s10 isnt 4k, it makes 4k as 1440.

[Michael_C]

Correct, the S10 has a QHD (1440p) display.

[NBI · Accepted solution]

The Samsung S10 camera is Capable of taking 4K video, but S10 display isn't 4k compatible so it just plays in 1440p in YouTube app. Yes the display needs to support 4K to play video in 4k resolution.

NBI

If you've found my post to be helpful, please like the post. If my response resolved your issue, please press the "✓ Accept as Solution" button.

[Mtiede]

What resolution happens when the 4k video is cast to a 4k TV?  Does it still only do the resolution of the phone?  Or what if the phone is running Dex on the 4k TV. is Dex playback limited to phone resolution?