Fake 3D Flipbook Rotation - how is it done?

Hey guys, an average Korean RTFX genious showed the fake 3D flipbook on his youtube channel:

One sequence is rendered from different angles, and those angles automatically switch depending on the rotation of the Niagara system itself.

My question to you is: how is this done?

How can this system-rotation-based switching between different flipbooks be set up purely in Niagara, using standard modules or Scratch Pad?

Thanks🐘