There are tons of worth watching Scientific, Educational, Entertainment & Music channels. I will list down few shortlisted ones that I like.
CrashCourse - As name suggest everything properly explained in short videos. Very informative and hooking. Each and every second is full of information.
Ted-Talks and its subsidiaries . - Name is enough.
Explosmentertainment - Best dark and cringey comedy show. These people go to extreme depths with their content.
5-Minute crafts and its subsidiaries - Ocean of DIY hacks. You will definitely learn a lot of things.
The school of life - Life lessons necessary for well balanced life. Check it out you will be happy after watching it.
Dark5 - Dark unsolved mysteries and secrets. Very intriguing.
All the science channels. - Can't name them all. Just search on youtube.
- Academy of Ideas
- The Chart Guys
- Then & Now
- Wendover Productions
- Real Engineering
- What I’ve Learned
i like this one a lot, Love mathematics fun watching this one
These are some of my favourites:
2) Marginal Revolution University
3) Decentralized TV
(There are many more, but these three are my top picks)
Infographics (Covers everything interesting) and Pewdiepie (if you like memes)
Live streaming all SPORTS
YouTube was especially made to share audiovisual information about any product or service. I personally spend time to watch reviews. Education, Health, Technology and Spirituality are my channels for I am always looking for.
National Geographic channel
Why Gold Silver By Mike Maloney especially his series on "Hidden Secrets of Money" - https://www.youtube.com/user/whygoldandsilver
Marginal University Revolution - https://www.youtube.com/user/MrUniversity
aantonop - Andreas M Antonopoulos - https://www.youtube.com/channel/UCJWCJCWOxBYSi5DhCieLOLQ