https://www.skillshare.com/en/classes/Masking-in-Adobe-Premiere-Pro/797810314

Visual effects, compositing, advanced editing. These are all tasks where masking lays at its foundation. In this class you'll learn all the details of advanced masking in Adobe Premiere Pro.

By the end of the class, you understand how masking works and are able to apply a mask on various effects or properties. You will also be able to perform advanced masking tasks such as tracking it with the movement of a subject, blending masks with different layers and making custom animations.