You have great videos about exponents for Math 1 and pretty much all of them also work for Math 2 standards, notably common core standards N-RN-1-3, and A-SSE-1b and 3c.  I don't see anything about exponents in the Math 2 content and can't assign Math 1 videos/exercises to my Math 2 class.  As a workaround, I am going to edit my class to make it Math 1 and 2.  But you already have good Math 2 content that should be part of your course mastery but isn't showing up for the class.