I also hear an amount of silence there (also hear not so loud on cheap speakers) but that is what made good effect on me this not to much ambient sound and gaps of silence - i say the sounds make a very good immersion of movements in those videos which presents there as a very interesting I was surprised by overall effect

for sure i was not longing for music mostly i distaste music in games,

(except one exception OVERLORD 2 - terribly good music +effect there as for my opinion ) so i not need music in games, one could add here in my opinion only some good narrational voice (also not to much

and not to 'cheep' or puffed but stright serious and balanced)

I can listen to it yet tommorrow maybe i will ad yet something