How to reproduce:
1. Download and open attached "VR Previz Prep" project
2. Select video "Screen4" in Project Tab under Assets/Media
3. In Inspector play the video clip

Expected result: Editor does not crash
Actual result: Editor crashes

Reproduced with: 2017.4.11f1, 2018.1.9f2, 2018.2.8f1, 2018.3.0b2, 2019.1.0a1

Notes: IMPORTANT! Make sure you have MPEG2 Codec installed (MS Store link: https://www.microsoft.com/en-us/p/mpeg-2-video-extension/9n95q1zzpmh4)
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Update: Fixed in 2019.1.0a10