Absolute gem, especially for people that are already aware of the plethora of good but well-known channels and are looking for something new and not recycled. Highly recommended!
I find myself totally absorbed in them, then I look at the clock and realise "What the hell am I doing? It's 1AM and I've just watched 3 hours of in-depth information about grinding a solid glass compact telescope for a micro-sat with refraction collimation techniques using equipment I have absolutely no chance of ever even understanding, let alone using?"
Yet, I persist.