The music is "ハジマリのオワリ（the end of the beginning）" of Vocaloid by 黄月るな's sing.
https://www.nicovideo.jp/watch/sm1647...
"ハジマリのオワリ" is a vocaloid song composed by Umetora（梅とら）.
https://www.nicovideo.jp/watch/sm1606...
黄月るな's song video list.
https://www.nicovideo.jp/user/1649344...
My woodworking video list
https://www.youtube.com/user/noho91/v...
My woodworking homepage　（のほほん木工房）
http://noho91.web.fc2.com/