Need help on animations

Hello, thanks for reading this in the first place.
I’ve been following this tutorial :

When I start the game, I can see my hands perfectly. But they aren’t animated. So. When I press H, for switching to the camera, I can see my Third Person Character. But, I can’t turn around and he is not animated.
Anyone know what to do? If you want I can add my project as a file oder add some screenshots.

Thank you!