Procedural Animation in Unity for game character

Hi all.
I'm trying to procedurally animate my game character using just a few animation poses. For example, for my character jump, I aim to use just 2 poses (keyframe) - one pose for crouching, and the other at the height of the jump.

A great reference for what I'm trying to achieve is this video -

[Animation Bootcamp: An Indie Approach to Procedural Animation]
In the above GDC talk the developer was able to do all the animations for the game with just 13 keyframe animation poses.

I'm looking for suggestions on how to go about achieving the same in Unity. Code/articles/any help is much appreciated.