Description: Experience ultra-high-definition 4K videos, now playing on YouTube.
Click the gear: Settings -> Quality –> 2160p 4k or higher!this playlist of our favorite 4K videos.
And if playing 4K videos at 3840×2160 isn’t enough to melt your device, try doing it at 60 frames per second. We’ve combined these two cutting-edge features for a few videos in this playlist. This feature may not work well on every device, but if you’ve got a powerful rig, try it out!
SOURCE: TestTube | YouTube