This feature already exists. There's a bar underneath each explanation video which displays the question number, type, answer, etc.; you'll find the star toggle on the left side of this. Same goes for the analytics view.
And Chemerinsky without a doubt is the star draw that I would have gone for!!! look at this: http://www.nxtbook.com/nxtbooks/cypress/nationaljurist0311/#/22
You can also "star" questions you miss on PT's using 7sage analytics ... This is HUGE to me as I can simply select all of my tests and sort by the stars! And then target them with my intellect.