Sure, YouTube has technically supported 8K videos since 2010, but the video sharing site only started labeling them this year. 8K has a resolution of 7680x4320, which is just insanely massive.
The first 8K video to hit YouTube is called "Ghost Towns" which was filmed using a RED Epic Dragon 6K camera in portrait orientation, reports TechSpot. In order to achieve full 8K, some of the scenes were upscaled or stitched together using Adobe After Effects. Since there aren't many native 8K cameras on the market, this is something that consumers won't get until sometime next year.
So now that there's an 8K video on YouTube, you can see if your Internet connection and PC are capable of handling 7680x4320, which they probably aren't. I'm running an 8-core AMD processor, 16GB RAM and a 34-inch ultrawide 3440x1440 monitor from LG - so the hardware is fine, along with a 100Mbps fiber connection and I get a jittery video, but it's a deliciously gorgeous jittery video.