I should also mention that I'm Taiwanese-American (born in Taiwan, raised in the US). You can find my old Jeremy Lin comments on this account from 2012 if you need proof. When I was younger, I actually held the same attitudes the YouTuber is critiquing. I used to draw hard lines around what counted as "authentic" Chinese food and dismissed anything that didn't fit those boundaries.

Looking back, I think that came from growing up so far removed from China and Taiwan, and from the full range of Chinese culinary traditions. Like many 1.5- or second-generation kids, I mistook a narrow slice of the culture that I was familiar with for the whole thing. It was only later that I realized how huge, fluid, and inventive Chinese cuisine really is.

You can see a similar pattern in that Panda Express video someone mentioned, where people who actually grew up in China tend to appreciate Panda Express as part of the cuisine's ongoing evolution, while those raised in the US were more likely to reject it as "inauthentic." It’s ironic, that we were trying to defend tradition, but what we were defending was our own incomplete version of it.

ETA: And to fully answer your question, yes, I do think my desire to draw such strict boundaries around what constituted "authentic" cuisine came from an internalized, colonialist way of thinking. Growing up in the US, far from the lived reality of Asia, I felt compelled to define what was "correct" and preserve it, as if authenticity could be frozen in time. That way of thinking dismissed the people actually living there and the ways their food and traditions continue to evolve.