Media Player - Video just displays from certain angles

Hello,

I’m working on a VR “Virtual Tour” Experience for the Quest 2 where the user can switch certain Rooms to show informational content. Every room represents a blueprint container that inherits from a Parent Template Room where I setup my basic parameters. I spawn and destroy the according blueprint rooms based on the users input actions.

However, some Rooms display Videos and for that I have a media player, media source (that get loaded in from the internal SD card), media material and a plane mesh to apply my material.

Everything works in principlal, but there is one odd problem: videos can not be viewed from the “wrong” angle. I tested some things and setup a rotating cube and applied the media material. Turns out, the video gets black as soon the cube faces a certain direction. The Up Axis always works though.

This is a problem because video planes sometimes facing the “wrong” direction and the video material remains black. What is going on here? I couldn’t find any solutions for this.
Thank you.