To reproduce:
1. Build attached project "android_video_repro.zip" on Android 4.4.
2. While running the built app, tap the screen to play the video

Expected: video is played
Actual: video is not played

Reproduced in: 2017.4.17f1. 2017.4.19f1
Not reproduced in: 2017.4.16f1, 2018.3.0a1, 2018.3.3f1, 2019.1.0b1, 2019.2.0a3

Note: tested with device
Note2: error thrown after touch event:

W/Unity (17622): AndroidMediaJNI got error: java.lang.NoSuchMethodError: no method with name='clear' signature='()Ljava/nio/ByteBuffer;' in class Ljava/nio/ByteBuffer;
W/Unity (17622): (Filename: /Users/builduser/buildslave/unity/build/PlatformDependent/AndroidPlayer/Modules/Video/Private/AndroidMediaJNI.cpp Line: 27)
W/Unity (17622): AndroidMediaJNI got error: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Float
W/Unity (17622): (Filename: /Users/builduser/buildslave/unity/build/PlatformDependent/AndroidPlayer/Modules/Video/Private/AndroidMediaJNI.cpp Line: 27)

Environment:
Windows and MacOS