You know, I've looked through a lot of tutorials and searches and had not found that platformer tutorial. Thank you for that!!
Just a quick tip: it's usually best to have an invisible square sprite with the platform movement, and position your animated player on top of that. The square sprite with the movement will ensure the movement is always smooth and never gets stuck.
As for this, I see how it would make the movement consistently smooth, but what method can you use to position your animated player on top of the square sprite? Pin? Is that what that does?