I think he should have picked a background and stuck with it, and he should have been more careful to position himself in relation to the camera. Watching him bounce around the picture was kind of nauseating.

Most of the aging happened in the second half of the video, if you watch closely you will see, in addition to around the eyes, that his hairline slightly recedes, and about 3/4's of the way through he puts on a small amount of weight...but then seems to lose it again before the end.

Also, it's an ongoing project. If he sticks with it through his life, we will eventually see him all the way into old age. I think that will make for a very interesting video (though, he's not the first one to have done this, obviously).