It would be useful to have a field added to the lesson similar to the "Liked" field. The status could be for the level of understanding which would help to select lessons for review. Pull Down could be something as simple as:
Full Understanding,
Partial Understanding,
Not Understood
or
Complete
Review
or a comprehension percentage
100
75
50
25
0
I have watched hundreds of lessons and lose track of ones I wanted to review again. I was marking ones I understood with "liked" but that has the disclaimer every time and feels like you are taking credit for someone else's work. I am aware it coild be done with tags but it feels conceptually wrong.