He missed this nail, then bent it over, then tried to pound it in anyway, then pulled it out, threw it on the ground and put a new one in.
I am a bit concerned by how much he's swinging that hammer around, scraping lots of rocks off no doubt. Also hard to believe that these are straight and lined up with how fast he's going, but you can't tell that from a 25 second video in the middle of the roof.
Why the fuck isn't he just using a nail gun like any sane roofer? He'd do a better job and go even faster. Did he practice this just for tiktok views or too lazy to find an outlet for the air compressor?