How to export Matinee movie with Buffer Visualization Modes on?

Go to your level and open level blueprint and create this nodes

BP_ConsoleCommands.PNG

Inside commands string you can enter following commands to get the view that you want:
viewmode unlit
viewmode wireframe
viewmode lit
viewmode wireframe
viewmode lit_detaillighting
viewmode lightingonly
viewmode lightcomplexity

I couldn’t find one for the reflection, but here the link to the doc where you can find the info about different view modes,

Thanks,