In this specific context, yes. Even if one of the poll workers was either intentionally doing something wrong or unknowingly doing something wrong it is so unlikely that no one else in there (voters, poll workers, poll watchers, challengers, etc.) stood by and did nothing. Perhaps if this was a more secretive exchange it would be more believable, but going to a polling place, announcing you are not registered to vote and being told that you can vote anyway without more is just so unbelievable unless the room was cleared of everyone but the Project Veritas guy, the poll worker, and the voter...which again is so unlikely that it is not worth considering over the much more likely explanation of the video being staged or without context (like the poll worker was making a joke, or an explanation to the guy that "Yes you can fill out a provisional ballot but it will not be counted") or something like that.