That's the video's fault, the article refers to it properly. Also I think it's fair to say that for some time iPad was pretty much the only usable tablet, so it just became synonymous
Yeah, I should have been more clear in my previous comment about that. But I just think it's strange logic. Like, no one is using 'Android' referring to any smartphone, or 'Toyota' when talking about cars, just because they have the largest shares within their fields.
I don't know enough about tablet sale history, but I am under the impression that a few years back iPad was really the only tablet device embracing the format strengths you could get, and the sales hugely reflected that. Android equivalents were just larger smartphones.
As for the logic part, I think it's not as uncommon -> q-tips are just a brand of cotton swabs, hoovers are just vacuum cleaners etc.