Useful YouTube Channels

[Randomface74]

Please recommend some YouTube channels which you consider to have high usefulness.

 

[jsmoke]

https://www.youtube.com/channel/UC295-Dw_tDNtZXFeAPAW6Aw

 

[b0rn2sk8]

Define useful?

What are you interested in?

 

[Randomface74]

Define useful?
What are you interested in?

It's not about being interesting.
It's about being highly useful.
The question is subjective, and that's fine.

 

[Delvis]

https://www.youtube.com/channel/UCPSfjD7o1CQZXzdAy56c8kg