Maccary Bay by Kevin MacLeod (incompetech.com), featuring guitar by Brett VanDonsel. Licensed under Creative Commons Attribution 4.0: https://creativecommons.org/licenses/by/4.0/ . Excerpted, faded and mixed underneath narration for these videos.
Source: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1500019