To reproduce:
1. Open the user-provided project
2. Select "MVI_7574.MOV" file from the Assets folder
3. In the Inspector, press play button

Desired outcome: The Editor does not crash.
Actual result: The Editor crashes.

Note: On some versions, the crash happens when pressing the Play button once again.
Note: Editor crashes on VideoClipImporter::StartPreview in Unity 2017.3.

Reproduced with 5.6.0b11, 5.6.3p2, 2017.1.0a3, 2017.1.0f3, 2017.1.0p5, 2017.2.0a1, 2017.2.0b4, 2017.3.0a1, 2017.3.0a6
Not reproduced with 5.6.0b10, 2017.1.0a2, 2017.2.0b5, 2017.2.0b9
Regression introduced 5.6.0b11, 2017.1.0a3, 2017.3.0a1

Fixed in 2017.3.0b1