I'm looking music that is similar to the music in this video https://youtu.be/l8eSkoT2buA?

The song is 'Martin' from the album "Growth and Form" (~2010) by mo-seph and Martin Dixon

It is available here --

http://freemusicarchive.org/music/mo-seph/

http://www.mo-seph.com/music/mo-seph/growth_and_fo...

I assume you would like other music by mo-seph, but some of the non-acoustic instrumentation reminded me of this --

"Selected Ambient Works Volume II" (1994) by Aphex Twin

https://www.amazon.com/dp/B00HZZ4LT4

You can hear audio samples here --

https://www.amazon.co.uk/dp/B072BPJGYK

Compare 'Martin' with #9 ('weathered stone')

You might have heard #17 ('z twig', which sounds like it could be a ringtone or an alarm), though the most approachable are the calming #3 ('rhubarb') and #20 ('lichen')

This album even inspired a book describing it's creation and impact --

https://pitchfork.com/features/paper-trail/9388-ap...

And it was #2 in this list --

https://pitchfork.com/features/lists-and-guides/99...

Don't get any ideas that all of Aphex Twin's music is like that. You may find some of his music quite disturbing.