I hear what you're saying about the vocalist not matching up with the video but the drummer is right on it from the beginning. Might be the video of the actual basic track with the vocalist overdubbing later.
I'm thinking that might be the case. It's one continuous video take, starting at the very beginning with Gadson very obviously playing that little fill before the take begins and no video cuts in between. The audio cuts from the phone into the mixed track. The drums, bass, and guitar parts are all verbatim. Can't see the keys.
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