Movie texture for GearVR

I'm creating a 'virtual' cinema in Unity 2018 and I have a plane with the Oculus MoviePlayer prefab attached and a simple script that set's the Gameobject (and therefore video sequence) active on click. Works fine in the Unity editor but not when deployed to device (Samsung s8 edge). I know that Android doesn't support video textures natively but surely the MoviePlayer prefab is intended for this? Anybody know how to apply movie textures to game objects?