You'll notice that Taniguchi has an extra finger! Kanno Takanori seems to have based his Shumi No Heya comics on this video, which is why you see Taniguchi with six fingers in those. post #209727post #209728
As for why this video originally has Taniguchi with six fingers, I don't know.
Thank you so muchfor watching to the end.
ここまで - literally "up until here". Since this was the last frame of the video, I used "end".