Rokoko for animation.

Rokoko is a Danish brand of consumer motion capture and animation technology products.Empowering 3D digital creators with high quality sensor based motion capture systems for body, finger and face animations.

You can start with only two web cams and you have great result. See the official website.

6 AI tools for 3D Animation you probably need by InspirationTuts.

You can find more on the InspirationTuts youtube channel.