YSK: All Down Dog Apps are free if you're a student or teacher

Down Dog makes really neat Apps that chain together smaller video snippets into cohesive workouts. So you don't have to follow the same video tutorial every day but get a different workout with whatever length or difficulty you want.
I personally really like their Yoga App, but they've got stuff like HIIT and Bodyweight Workouts too.

Who counts as a Student/teacher? Anyone with a .edu email address. They re-confirm the email every 2 years.

Completely unrelated YSK:
There are throwaway email generators that have .edu mails.