Followed the video, and during the second bake got 'grid lines' that matched level 0 topology on my bake instead of pores. Swap from blender 3.5+ to 3.2 (Or ~ the same version Kent was using during this video). This solved my problem and i got a proper bake! :)
Blender 3.5.1 produced "Grid lines" for me too.
Blender 3.3.7 LTS worked fine.