Hello everyone;
I'm here to ask a question,
For begin, i'm beginner... so don't judge me too harshly haha.
I follow a good Youtuber who "Make an action RPG in Godot 3.2" :
https://www.youtube.com/channel/UCrHQNOyU1q6BFEfkNq2CYMA
In the follow video, after creating few animation with "AnimationPlayer" like "RunRigh", "IdleRigt", "RunUp"...
He just set "animationPlayer" With $AnimationPlayer and after this, the line who do the animation is "animationPlayer.play("RunRight")

In my goDotproject, i have the same configuration as his:

But i really don't understand how doig the same thing at him. I am trying to search on Internet and on this forum, but i didn't found my answer.

(Sorry for my probably bad English)
Thank you in advance,
Xemnai