code: public void attachVideoRenderer(GLSurfaceView glView) {
          if (null != glView) {
              VideoRendererGui.setView(glView, new Runnable() {
                  @Override
                  public void run() {
                      Log.d(TAG, "VideoRendererGui GL Context ready");
                  }
              });
  
              remoteRender = VideoRendererGui.create(0, 0, 100, 100,
                      VideoRendererGui.ScalingType.SCALE_ASPECT_FILL, false);
              localRender = VideoRendererGui.create(70, 5, 25, 25,
                      VideoRendererGui.ScalingType.SCALE_ASPECT_FILL, false);
          }
      }
docs: Attach the call's video renderers to the specified GLSurfaceView
  
  @param glView  The GLSurfaceView on which to render video