Hello Hajar! The animation style you're referring to, where objects appear to turn around, can be achieved in Spine using techniques that create a "fake 3D" or "2.5D" effect. Spine is primarily a 2D animation tool, but it allows for some 3D-like effects through clever use of meshes, image swapping, and Free-Form Deformation (FFD). By carefully planning and rigging your character or object, you can simulate a 3D rotation by interpolating between different poses or using mesh deformation to give the illusion of depth and perspective change. You can find examples and tutorials on how to achieve these effects on the Spine Twitch page, which includes downloadable projects and rigging demonstrations.

hajar Welcome to the Spine forum! To learn how to make animations like the one in the video you showed us, you may want to have a look at our blog post called "Rotating diamond tutorial". This is a step-by-step tutorial that shows you how to create a diamond that rotates as if it were 3D:
Blog: Rotating diamond tutorial

If you have any questions after trying it out, don't hesitate to ask us!