This video, titled ‘Undertale OST: 072 – Song That Might Play When You Fight Sans’, was uploaded by Misaki on 2015-09-17 17:16:33. It has garnered 9564694 views and 137574 likes. The duration of the video is 00:01:03 or 63 seconds.
Undertale is a great game and I really do highly recommend it, you can get a copy at http://store.steampowered.com/app/391540/
Get the Soundtrack on Steam or at http://tobyfox.bandcamp.com/