Usagi Electric and his series about reviving old Centurion minicomputer - https://www.youtube.com/c/Nakazoto/

Plainly Difficult for radioation accidents and and other science/technology gone wrong stuff - https://www.youtube.com/c/PlainlyDifficult

VWestlife for reviews of various old audio equipment and other thrift store finds - https://www.youtube.com/c/vwestlife

Tim Traveller for trip reports from various unusual places (weird country borders and stuff) - https://www.youtube.com/c/TheTimTraveller

Tentacrul for UX explained on DAWs and other music stuff - https://www.youtube.com/c/Tantacrul

Railways Explained for... well explaining the history and future of various world railways systems - https://www.youtube.com/c/RailwaysExplained

NFKRZ for explaining context of living in Russia - https://www.youtube.com/c/MultiNfz

Bald and Bankrupt for unusual travelogs in post-soviet countries and other places - https://www.youtube.com/c/baldandbankrupt