Is cross-simplifying the product of fractions taught anywhere on Khan Academy?

Does anyone know of a video or article anywhere on Khan Academy that teaches how to cross simplify fractions?
[image showing cross-simplifying the product of two fractions by dividing the numerator of the first fraction by 3 and the denominator of the second fraction by 3]

I was answering Questions in the 6th grade math course, and a learner was confused when Sal cross-simplified two fractions that were being multiplied together.  I looked through the math courses to refer them to a video or article that explained cross-simplifying, but could not find one (I looked through all the video/article titles in the lessons about multiplying fractions in '6th grade math', '5th grade math', and '4th grade math').

(The cross-simplifying was in the Unit 7 Lesson 5 video  'Finding mistakes in one-step equations' at 2:38.)

Does anyone agree that Khan Academy should teach cross-simplifying fractions somewhere in the '5th grade math' or '6th grade math' courses?