I follow a lot more art/animation channels than anything but some top favorite would probably be
Music: Andrew Huang/Suture Sound, In Love With A Ghost, Shawn Wasabi, Ujico*/Snail's House, Tokyo Machine, waneella, sheofficial
I'm not sure if it counts as educational but, The Slow Mo Guys (stuffs just fascinating to look at and they're funny)
Animation: Domics, VIVINOS, Wothikids, Seelmaru, UnknownSpy, Louie Zong, Bou, Boun, Zemyata , Rensaven, limeSmoothie (there's like a bunch more from the animation meme community but that'd take a while)
Art/Illustration: Kiwifie, Leonardo Ito, Mee, Miri, Par0llel, Sarlis, ėė¤ė/rrr00122 (they do art and animations)
I feel like there's other channels whose content I tune into often but names are hard