3D Cartoons?

Are 3D animated videos considered cartoons?

Absolutely. Pixar was built on this, as was Dreamworks, and Blue Sky Studios, and Illumination Entertainment. Provided that it's more than a still image, and actually does something, that's animation, and it counts. :)

Yes...3D, 2D, claymation, Rankin-Bass, even "South Park" is considered animation.

I think what we can see on our television set is 2D cartoons not 3D Cartoon.

3d cartoon see by few people,most of the people prefer 2d cartoon.