Is it possible to load model, animations and other files at run time from cloud/other web API in unity android app?

Hello, I have been working on an android project which requires to have new models each time so I want to build the android app once in unity and load the models at run time from cloud/WEB. Then I will just create a model and store it on somewhere(cloud).

Is this possible?

If Yes then:

1): How?

2): What type of files can I load & use at run time (.fbx, images, .unitypackages, video, audio, animation)?

3): Which is cloud that supports unity for storing and loading these types of files?