Hello Thomas. Can you post a screenshot or maybe a video screen grab to see this in action. But I think that really isn't a problem per se, since you cleared the UV's, whatever method is set Blender will make the UV's in a few different ways, but that's just a default layout product of how the model is in itself. At that point in the video the UV's is not yet worked at. The important part is what follows of unwrapping the shader ball.
I tried to use imgur, but its down and unreliable right now, thats why I posted in the discord.
Okay, I see what you are saying and will continue the rest of the video. Thank you.
Then went through all the different types of unwrap and back to the plain Unwrap and got this. Total confusion
Hmm... The unwrap does an unwrap and pack, and if there's no possible unwrap then it skips that step and just does the pack. If you did a reset and then tried to unwrap a sphere without any seams, the unwrap would fail for being impossible and you'd end up with the squares from the reset but packed. Is that it?