I didn't downplay it, I just wasn't talking about that at all. The video I was talking about didn't make that claim, and I wasn't responding to the comment which did. I don't see any evidence for that claim though. I would agree the most likely hypothesis is some kind of compression pipeline with an upsampling stage or similar.

ETA: I rewatched the video to the end, and I do see that they pose the question about whether it is targeted at certain content at the very end of the video. I had missed that, and I don't think that's what's happening.