ARtoolkit problem on android

Hi guys, I'm having troubles at running ARtoolkit (one Augmented Reality framework) on android. Seems like after releasing of unity 5.2 issues related to the shader/material used to the video panel made it impossible to work, but I fixed it after using the following shader instead:

 Shader "VideoPlaneNoLight" 
 {
   Properties 
   {
     _Color ("Main Color", Color) = (1,1,1,1)
     _MainTex ("Base (RGB)", 2D) = "white" { }
   }
   SubShader 
   {
     Pass 
     {
       Material 
       {
         Diffuse [_Color]
       }
       Lighting Off
       ZWrite Off
       Blend SrcAlpha OneMinusSrcAlpha
       SeparateSpecular Off
       SetTexture [_MainTex] 
       { 
         constantColor [_Color]
         Combine texture * constant, texture * constant
       }
     }
   }
 }

I've also had some problems building on android, but after creating the right plugin I've finally made it work. Problem is the phone shows no video and only a black screen (even tough the menu works). I don't know if it's a problem related to the camera or the material I used, someone with more experience could help me out?