One of the reasons why Full HD videos look better on our phones compared to our monitors is because of pixel density, where the same amount of pixels has been crammed into a smaller 6-inch ish screen, versus the same resolution but spread across a 24-inch or 27-inch display.
If you watch a lot of YouTube videos on your phone, then you might be interested to learn that the Android app has recently been updated where it will now support 4K HDR playback on pretty much any Android device. This means that even if your Android smartphone’s resolution is capped out at QHD or QHD+, you can still choose to watch the video in 4K.
Obviously your screen isn’t going to magically support the higher resolution, but reports from users claim that choosing 4K will result in higher fidelity. Also, with the help of downscaling, it seems that the videos will end up looking sharper, assuming you can tell the difference. Even if you can’t, we suppose it’s not a bad thing to be given more options.
At the moment, there aren’t that many smartphones that offer 4K displays so only a handful will truly be able to take advantage of the changes and utilize it to its fullest potential. Google hasn’t officially confirmed the changes, but if you have YouTube on Android, then this could be something to check out and see if it makes a difference to you.