Among others that have already been mentioned (Applied Science, Bon Appetit, Food Wishes, etc.):
* Game Maker's Toolkit -- in depth analysis of game mechanics and game design (from a journalist / player perspective, not so much a technical one -- though he does host yearly game jams -- my point-and-type entry last year was https://vgel.itch.io/themengi </shameless plug>)
* Historia Civilis -- very in-depth takes on (mostly ancient) history, military, & politics
* Clickspring -- professional clockmaker, has a series of him building a mechanical clock, and is currently working on a series of him recreating the Antikythera Mechanism with investigations into the original construction methods
* This Old Tony -- videos on hobby machine shop projects
* Steve1989MREInfo -- showcases old military MREs, talks about their design / development, and eats & reviews them... including 40+ year old ones. It sounds weird, but it's strangely interesting and calming.
* Game Maker's Toolkit -- in depth analysis of game mechanics and game design (from a journalist / player perspective, not so much a technical one -- though he does host yearly game jams -- my point-and-type entry last year was https://vgel.itch.io/themengi </shameless plug>)
* NativLang -- (Mostly comparative / descriptive) linguistics videos
* Historia Civilis -- very in-depth takes on (mostly ancient) history, military, & politics
* Clickspring -- professional clockmaker, has a series of him building a mechanical clock, and is currently working on a series of him recreating the Antikythera Mechanism with investigations into the original construction methods
* This Old Tony -- videos on hobby machine shop projects
* Steve1989MREInfo -- showcases old military MREs, talks about their design / development, and eats & reviews them... including 40+ year old ones. It sounds weird, but it's strangely interesting and calming.