Channel names: Marco Bucci, Proko, Sinix
Marco Bucci: really good content basic basic stuff of painting. Shapes, colours, brush strokes. Good when you have a rather good idea of what you want to paint but wish to improve on presentation. Recommend watching the recent video on digital art. This really helped me with integrating my traditional art background into digital art.
Proko: Cool featured interviews with varies artists. Fun to watch and learn a bit. Rather higher level art advices.
Sinix: similar to Marco Bucci. Emphasize on shape and colour rather than line art. Good materials on structure and fundamental anatomy. Good draw alone exercises.
BAM animation: Good for beginners. Actually helpful when you are just starting digital art. Recommend watching the recent video on how to draw clean line art.
Izzy Fermecat 