YouTube

As a music teacher, I have found the following YouTube channels helpful in teaching:
Andrea Bocelli (singer)
Carnegie Hall
Clap clap kids - nursery rhymes and stories
Disney On Broadway
DoodleChaos - synchronizing things to music
ElementaryGrooveTracks - reading music
Mr. Henry's Musical World - reading music/body percussion
Plank Road Publishing
PTXofficial - Pentatonix's (vocal group) YouTube channel
TheLearningStation - a lot of great brain break videos!
ThePianoGuys - my students love these videos!
Visual Musical Minds - reading music/body percussion

As an educator, I have found the following YouTube channels helpful during online learning:
Mr Lee Teaches
New EdTech Classroom
Pocketful of Primary
ShakeUpLearning
Technology for Teachers and Students
Techy Coach