Not sure this is relevant to Vuforia;

see here:

https://docs.unity3d.com/Documentation/Manual/android-GettingStarted.html

I think it is not a Unity.

Screenshot:

As far as I know, Vuforia should not cause any such message to appear on the screen.

Have you reproduced it with the Vuforia samples ?

Have you tried with a new Unity project without using Vuforia ?

AlessandroB, Thanks for the answer!

I created new project in Unity Pro and added last version sample "videoplayback-2-8-9.unitypackage"

When I run the project on the Galaxy S4 - Turns camera, then if tapan once - starts to play the sound, but the video is not visible.
I disable ARCamera and put simple Camera - but again only hear the sound on a black background.

Then I added simple plain and in VideoPlaybackBehaviour.cs added line in method "HandleStateChange":

       // If the movie is playing or paused render the video texture
        // Otherwise render the keyframe
        if (newState == VideoPlayerHelper.MediaState.PLAYING ||
            newState == VideoPlayerHelper.MediaState.PAUSED)
        {
               MyPlain.render.material.mainTexture = mVideoTexture;

                ...

Video was played on my texture! Cool!

But when I press start at the bottom appears colored text "Development Build".
Where is the mistake?