Specifically the video of Jennifer Thompson.
I never try to intentionally flare, and while also not trying to tuck excessively, have tried to control my elbows from shooting back on heavy reps/singles, which they seem to want to do "naturally."
Trying for movement of the bar and elbows as close to unison as possible.
Her elbows move back before the bar leaves the chest it seems, so the bar still moves back off the chest.
The times when i think i get it most wrong are when i try and keep them from shooting back, and the bar leaves my chest, and then they shoot back.
It's been a while, but that can lead to a few inches of overly vertical bar rise.
I think this is less a form check post, as just wanting to see other people's views on the topic.
If i hadn't looked closely again at this (fairly representitive of a "good" rep in my book) , i'd have thought my elbows didn't flare/move at all before the bar rose, but they do just a bit.
I think i'm fine with that.
fwiw, my grip is ring fingers on the rings.