[_____s]

Depends on how you define advanced, but check out:

* Low Level JavaScript https://www.youtube.com/channel/UC56l7uZA209tlPTVOJiJ8Tw

* David Beazley: https://www.youtube.com/channel/UCbNpPBMvCHr-TeJkkezog7Q

* Jacob Sorber: https://www.youtube.com/channel/UCwd5VFu4KoJNjkWJZMFJGHQ

* Computer Science: https://www.youtube.com/channel/UCSX3MR0gnKDxyXAyljWzm0Q2

* Computerphile

I also like a bunch of streams (Jon Gjengset for example), and some with few but extremely thorough videos (like Leeren for vim).

[yesenadam]

Jacob Sorber is great, thank you! It seems he doesn't have so many views because his videos are mostly just 4-5 minutes, "surely not long enough to do anything serious"...but they're so brilliantly done, marvels of clarity and concision.