Reproduction steps:
1. Open the attached project "VideoPlayerProblem.zip";
2. Open the problem.unity scene;
3. Press "Play" button;
4. Observe the game view;

Expected results: the video from Streaming assets should not be displayed on RenderTarget Mesh;
Actual results: the video starts playing after entering a play mode;

Reproduced on: 5.6.2f1, 5.6.0b1, 2017.1.0f1, 2017.2.0a4.

Note: videoPlayer.audioOutputMode is set to None, which works as expected. PlayOnAwake is set to false, but the video is still played after method Prepare().