I felt like the applied science video was an ad. He said they sent him the printer to do the project so he at least got the printer free. I didn't hear any other disclosures but the entire back half of the video was talking about the printer
It being an ad does not imply that it's a lie.
In fact historically lieing in an ad could get you lawsuits or FTC complaints. I know creatives at agencies who would have to go through legal review to ensure every factual claim they made was true.