Three reasons why 8K resolution may not be available to you: 1- You are watching the video through KZbin Application, so use a computer and a browser. 2- Your device does not support video with 8K resolution and high bitrate so watch the video at lower resolution like 4K, 2K, 1080p and etc. 3- KZbin is still compressing the 8K resolution to make it available to you.