How does a planet grow that much? Where is the mass coming from? Where is all the extra water coming from to fill in the gaps between the land masses?
Also, there are problems with his videos. In some places he is showing stretching without stretchmarks. And...when you put a skin of a small sphere on a larger sphere, there are going to be places where the skin puckers or bunches up. He doesnt show any bunching occurring in his animations. That is not very scientific.
You ask a lot of great questions. He answers them all in the videos, or in other write-ups on his site.
In some places he is showing stretching without stretchmarks.
I forget which video it is, but he goes to great lengths to show the stretch marks on planetary surfaces. That's exactly what he calls them, too.