really? I usually hear it pretty clearly too, but here it sounds more like o to me
Yeah, I do. But such 'trying to check whether I hear something or not' usually results in me thinking that it's okay.
Anyway, you know Polish pronunciation well, if you think something is being pronounced in a weird way, you can safely presume that your intuition is right and the voice may be a bit wrong. I think the only big surprises are three words (and their forms) written with rz but pronounced with r and z like separate sounds: Tarzan (the character), marznąć (to be cold) and its quite numerous forms, and mierzić (to disgust, sicken) - here it's r and zi separately.
I found a list of words where these are pronounced separately https://pl.wiktionary.org/wiki/Aneks:J%C4%99zyk_polski_-wymowa-_dwuznaki