Primary resources

This link takes you to the 2D kinematics sections of the openstax college physics textbook:

This video is a basic introduction to 2D kinematics via a projectile motion example:

https://www.youtube.com/watch?v=BZwizmCI_g0

Secondary Resources

This link provides a discussion about a simple case of a falling object in a 2D system:

Other Resources

Great introduction for 2-D kinematics, with a nice example problem towards the end.  But beware, the notation is poor and she lists "disadvantageous" kinematic equations.  

https://www.youtube.com/watch?v=p3wGLMz02Wo

2D kinematics section PDF from MIT. 

http://web.mit.edu/8.01t/www/materials/modules/chapter05.pdf
 

Freefall: Horizontally Released Projectiles (2D-Motion)