Strumpy Shader Tutorial - Vertex animation shader

To help me get started on my project a classmate recommended this tutorial:

Part 1:
https://youtu.be/zNmPxbDBULw

Part 2:
https://youtu.be/kkGN70KEKhU

Part3:
https://youtu.be/kM4t7SuuBKI

This tutorial focuses on Vertex animation. By painting vertexes in Maya, Unity knows which vertexes to move, which direction, how far, etc.