I tagged a few images with "extra_digit" but it looks like there aren't as many floating around as I thought - at least not within the "error" tag, anyway. To be honest I don't think it's really necessary.
The author may have done this on purpose. He mentions the six finger thing on the page. Additionally, the picture after this one also has Taniguchi with 6 fingers.
I can't see the videos. The first one requires me to join a website that I am incapable of joining due to not being able to read Japanese. The other video is a broken link.