I noticed that Kurzgesagt - In A Nutshell on Odysee does not have sound when you download their videos and there is the annoying feature that all videos have the same name. So I downloaded a few with sound and provide some links here to watch more. I put the Odysee channel first because I don't much care to promote youtube or any google products these days.
Kurzgesagt- In A Nutshell (Mirror) - https://odysee.com/@Kurzgesagt:bf
Kurzgesagt- In A Nutshell - https://www.youtube.com/@kurzgesagt/videos