Make sure you enable 8K / 4230p resolution in the video settings!
For an optimal experience, choosing the right app to play this video is crucial. My assessment and recommendation:
With Meta Quest 3:
YouTube VR app = 70% quality
SKYBOX VR Video Player app = 85% quality
With Apple Vision Pro:
YouTube VR app = does not work with AVP
Patreon Direct Download = +200% quality (compared to Quest 3)
The Patreon Direct Download for Apple Vision Pro contains a 16k video file instead of YouTube's 8k file. It offers HDR colors and low compression. The result is a very clear and sharp image.
In my subjective opinion, the result is 200% of what is possible on the Quest 3.
@XploreVR