If I were discrediting the channel as a means to discredit the video or its content, that might be poisoning the well. But the content is (god, I hope) not at issue. Discrediting the channel on its own merits is more of a "hey look, poison!"

Anyway. I'm comfortable that a reasonable person can page through YouTube, Google some names, and determine that no sort of reciprocity is going on here. If they care.

The revisionism is annoying, but fortunately the "community" to which you refer is structured around providing "context" that, to dispassionate observers, merely proves the point.