Not sure if this has been posted here or not.
http://www.onemonthgameschool.com/class/make-2d-games-with-unity/Brandon Wu is back at it with his latest series - Get Started with Unity 2D — Let’s Make a 2D Platformer with Unity and PlayMaker
CONTENTS
41 Video Lessons
13 Project Steps
22 Additional Resources
Definitely aimed at beginners with a basic understanding of Unity and Playmaker but covers the 2d animation system amongst other things.
This is just one small section listed below.
Set up a 2D character with animations
Import a single sprite
Import multiple sprites
Create animations using Unity Animation tools
Create animations using a sprite sheet
Change animations in the game with control
Set up animations in the animator
Set up key controls in PlayMaker to update animations
There is a cost to this course $25 but I think that's reasonable for thew content.
Cheers