More gamification features

For example:

Reward with a badge after watching x min or hours of video (for me this means they have persevered with a desire to master)

Getting badge C means getting badge A And B first.

Getting badge C unlocks new content/bonus

A points system - getting badge A = x points and so on. When they get so many points that triggers a notification to me or new content.

To research:

A little game app called Animal Restaurant has the best gamification I have seen. It is also a lovely looking app. It is worth a look if you aren’t already familiar with it.