Yes I also watched this video. However, his hair actually got much thinner 12 - 16 months post surgery. As I noted, his hair actually was thickest at 7 months according to the video. This is very strange unless he did something to his hair to warrant such thinning, otherwise his hair should have continued gaining density.
Disconcerting to me is the fact that I wanted to add this doctor to my list. Good luck.