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Video flash before playing

I'm trying to create a smooth transition from target image to video (I'm developing for iOS). Is there an easy way to do this within the videoplayback script or in the Unity inspector? I simply want to fade the video in slowly. Right now, I see a white flash and then the video starts playing. Why am I seeing a brief white flash?

Can I fade the opacity of the shader or material, or is there some other way to fix this problem?

Here's an example: https://www.youtube.com/watch?v=vsj7LNuNEwI&feature=youtu.be