Embedded in a window

Is the rendered demonstration interactive or purely linear?

What does spin mean in that case?

Is there a royalty if we use your tools to build a demonstration of an exercise position that is used in a Window of our UI in a Rehab tracking product, which prescribes a physical rehabilitation exercise? We currently do this and would like to add the visual.

It is linear, other than camera view for zoom and spin

Typical Pan Tilt Zoom of the linear rendering so the exercise could be viewed from side and front

Epic would consider that interactive, and thus royalty-bearing.

I need it too!!!