Hey there!
I can answer you those questions but just a word of warning. The settings on the preview cameras are broken and you will not get good quality recordings in engine. Reflections, colors and light in general are not working right. It appears Epic truly meant for it to be nothing but a preview.
We ended up creating a setup where we’d have calibration textures as planes for the surfaces we wanna render. Render everything at a significantly higher resolution and then project that output in after effects into the movie files we wanted.
During this test period I rendered it out via the rendering queue. Using a custom util that would grab the planes from NDisplay, look up the material and assign it to a UI widget.