How can I integrate a video as a texture in the skylight? (VFX)

Hi,
I am using Unreal for some VFX shots at the moment. The problem is that I need the background video as a texture in the skylight so that my objects getting the right reflections when the camera is moving. (I am using the image plate plug-in in sequencer and a tracked camera)

How can I archive this?

Best regards, Andreas