Why can't I play 2 animation track at the same time in Timeline ?

I’m trying to move and rotate camera at the same time in timeline. To do this, I added two animation track to camera. One animation clip moves camera position. And the other one changes camera rotation. But they are not working at the same time. When I press “preview” button, only rotation of camera is changing.

This video may help understanding

All Animation tracks (actually all animation sources on the Animator) override each other. What you want is additive blending, which is not supported.