How to reproduce:
1. Open the attached project
2. Build and run on Android device
3. Click on the button which has "Video audio: Sound"
Result: Crash

Note: Project has two videos, one with audio and one without. Playing video without audio plays successfully. Playing video with audio in one of the Audio Output mode: None, Audio Source, Direct crashes application

DUT(reproducible):
LG G5 [LG-H850], Qualcomm Snapdragon 820, Adreno 530, OS 6.0.1
Google Nexus 4 [mako], Qualcomm Snapdragon S4 Pro, Adreno 320, 5.1.1
Samsung Galaxy S5 Neo [SM-G903F], Samsung Exynos 7 Octa, ARM Mali-T720 6.0.1

DUT(not reproducible):
iPhone 6+ (iOS 10.1) <- video plays but without sound in all modes
Checked on Windows and OSX editor, project doesn't crash

Crash reproducible: 5.6.0b5, 5.6.0b7
Not reproducible: 5.6.0b4 video doesn't play at all in any mode