bapho In Spine, only bones can be directly bound to meshes. Bones can be constrained using paths. Additionally, paths can be bound to bones, allowing you to constrain bones bound to meshes using paths and further control those paths with other bones. By applying physics constraints to these control bones, you can achieve the same setup.
However, if there is no specific reason to use paths, the combination of meshes, bones, and physics constraints alone is sufficient to achieve the effects demonstrated in the video.
In any case, if you want to learn more about setting up the use of paths, I recommend reading the documentation for Stretchyman, one of the example skeletons:
https://esotericsoftware.com/spine-examples-stretchyman
