The music is "Completeness Complex（完全性ｺﾝﾌﾟﾚｯｸｽ)" of Vocaloid by Kouduki's sing.
https://www.nicovideo.jp/watch/sm1921...
Original Vocaloid
https://www.nicovideo.jp/watch/sm1545...
10 years ver.
https://www.nicovideo.jp/watch/sm3922...
Kouduki's song video list
https://www.nicovideo.jp/user/1649344...
My woodworking video list
https://www.youtube.com/@noho91/videos
My woodworking homepage　（のほほん木工房）
http://noho91.web.fc2.com/