Internet Comment Etiquette with Erik and Internet Historian come to mind. Nord VPN Man and Raycon Man ads are the highlight of the latter's videos.
Internet Comment Etiquette was the one I had in mind, yeah.
One of my favourite instances of this was in podcasts where Cards Against Humanity sponsored and just sent one of the podcasters toasters to review: https://cardsagainsthumanity.com/toasters/
Nothing else was said about the sponsor's product. There should be more sponsors like that.
Jay Foreman (Map Man, Unfinished London) does sponsorship messages as silly skits, which is nice.