I have a problem running latest Vuforia samples.
When I run them on HTC Nexus 9 device (Android 7.1.1) everything is fine. But when I run them on Samsung SM-T560 (Android 4.4.4) device there is no video background - only black screen. However, the targets are correctly detected (but not shown).
I faced this problem when I tried to run my app on different devices. I though the problem was the way I am using Vuforia library, but then I ran samples and the problem was still there. If there is a way to fix this and somebody knows how, that would be very nice.