message: Add tutorial vid links.
diff: @@ -24,6 +24,9 @@ The easiest way to try out the experimental GPU delegate is to follow the below
  ### Android (with Android Studio)
  +For a step-by-step tutorial, watch the
  +[Experimental GPU Delegate for Android](https://youtu.be/Xkhgre8r5G0) video.
  +
  Note: This requires OpenGL ES 3.1 or higher.
  #### Step 1. Clone the TensorFlow source code and open it in Android Studio
  @@ -55,6 +58,9 @@ run on the GPU.
  ### iOS (with XCode)
  +For a step-by-step tutorial, watch the
  +[Experimental GPU Delegate for iOS](https://youtu.be/a5H4Zwjp49c) video.
  +
  Note: This requires XCode v10.1 or later.
  #### Step 1. Get the demo source code and make sure it compiles.
  