Yep looks like a job well done.
In the interests of learning from it - carb ice might be a likely cause of the rough running? He says 'carb heat checked' at the beginning of the video but it all seemed pretty rushed. Then there was a delay between the check and starting the takeoff run, with the engine at low RPM, which might have allowed ice to form.
As a low hours pilot myself I am paranoid about carb icing, and tend to do a quick recheck of carb heat just before lining up on the runway. On more than one occasion this summer the recheck revealed that ice had formed after my initial power check.
Looks like a hot summer's day judging by what he is wearing. I wonder what the humidity was.