Steps to reproduce:

1) Download attached project ' VideoPlayerPlayOnAwake.zip' and open in Unity
2) Open scene 'BugScene'
3) In Hierarchy tab, click on Quad gameObject and check if VideoPlayer component has WaitForFirstFrame enabled
4) Press Play
Note: Video Clip will not be played on a Quad

Expected result: Wait for first frame to be ready before playback and play a video clip
Actual result: Video never starts to play

Reproduced with: 5.6.0b11, 5.6.0f3, 2017.1.0b1
Reproduced only on Windows machine
Works fine with 10.12 macOS

in 5.6.0b10 and earlier it wasn't possible to attach .mp4 video to Video Clip