Tech Ingredients https://www.youtube.com/c/TechIngredients

Applied Science https://www.youtube.com/c/AppliedScience

Essential Craftsman (Construction) https://www.youtube.com/c/essentialcraftsman

Practical Engineering (civil engineering) https://www.youtube.com/c/PracticalEngineeringChannel

Adam Neely (music geekery) https://www.youtube.com/c/AdamNeely

Other favourites that are less science/education:

Scary Pockets (Funk covers with top tier musicianship and production values) https://www.youtube.com/channel/UC-2JUs_G21BrJ0efehwGkUw

VASAviation (air traffic / radar of recent aviation events) https://www.youtube.com/c/VASAviation