I'm working with my own Vuforia project based on VideoPlayback and Cloud Recognition samples. I have problems with superimposed video with some image targets. With these targets, there's moments that be able to view the video depends on inclination of the screen. If I place the smartphone screen in front of the image, I can't see the video but I can hear the audio of the video.
However, with other image target I can see the same video perfectly.
What is it happening?