Indeed! I'll pile on some of mine just in case:

https://www.youtube.com/@HyperspacePirate

https://www.youtube.com/@AirCommandRockets

https://www.youtube.com/@LesLaboratory

https://www.youtube.com/@harrisonlow

https://www.youtube.com/@michaelrechtin

https://www.youtube.com/@HuygensOptics

https://www.youtube.com/@jdflyback

Not builders per se but really informative still:

https://www.youtube.com/@Lantertronics (great electronics vids, especially analog guitar pedal stuff)

https://www.youtube.com/@machinethinking (machining history)

https://www.youtube.com/@AgentJayZ (in-depth about jet engines)