HelloAR doesn't render camera

Question

As said in the title, I've got an issue with HelloAR scene, when I press the play button in the editor the webcam doesn't start playing, on the phone the camera renders a black screen

Answer 1

I had to use a backup from yesterday to make it work again :\

Comments

My cell phone did not create and saved the video was by the android version.

Android Version 4.2.2 Does not save Video, with the most modern versions does not generate any problem.