The person referred to as "him" here is "Morrison?"
Answer from a Native speaker
Yes and no. "Him" could refer to Morrison, as he is the creator of candy floss, and thus the one to blame if you end up having any problems, but "him" could also refer to your dentist! Since Morrison was a dentist who ended up creating candyfloss - which can give you dental issues - you can blame your dentist for your cavities (this is more of a joke though). This part of the video is intentionally ambiguous, so that you can decide who "him" should refer to. Ex: I know he is innocent. I don't blame him for anything. Ex: Who would blame him for staying home?