true, but if Team A (foolishly) walks away from a punt that's still rolling or has just stopped rolling, then Team B might change their mind about picking it up.
Can't tell from the tape. It's possible that Team A walked away because a whistle had already been blown.
But if they give up on the live ball prematurely, that's their mistake. and if Team B wants to capitalize on it, that's their prerogative.
In general, I think we should be extra careful anytime we see TEAM B gathering around a punt like this. Because it's the opposite of what usually happens on a rolling punt. and it could be a "warning sign" of an unusual return.