I don't know if the parent comment has been edited, but in its current form I read it much differently from you! It seems like fair criticism without any added snark or contempt. I don't want hostility or gratuitous negativity, but IMHO it's just not present here in the way you describe.

(Also the guy has millions of subscribers and a consistent weekly posting schedule, and this video is on the front page of HN, so I don't think his channel falls into the category of obscure hobby projects where it might be rude to criticise them at all rather than just ignoring them.)