I study using the Unagrande YogaClub application, it has a lot of ready-made lessons, no ads, you can track your class history and personal statistics.
Yoga with Adriene, or Adrienne - YouTube channel. Great positive girl from the states who makes simple and clear videos every week. The arsenal already has a lot of videos on different muscle groups, weight loss, yoga basics, etc.
I haven't met any other good channels or applications, although I searched a lot