I don't watch much YouTube but I like these channels

Andreas Kling
https://www.youtube.com/c/AndreasKling
Lead programmer of SerenityOS

Luke Smith
https://www.youtube.com/channel/UC2eYFnH61tmytImy1mTYvhA
Makes videos about technology and Linux related stuff but recently has been making videos about other stuff

Mental Outlaw
https://www.youtube.com/c/MentalOutlaw
Like Luke Smith but only talks about technology

tripcode!Q/7
https://www.youtube.com/channel/UCZrrEuHiQjN2CUo84g5tk7w
Makes videos about mostly repairing/improving ThinkPads

History Matters
https://www.youtube.com/c/TenMinuteHistory
Makes videos under ten minutes about commonly asked history questions and has humor in it.

OverSimplified
https://www.youtube.com/c/OverSimplified
Makes videos about wars in a simplified and a funny manner