unity3d - Unity Video script not playing sound -

im using plugin unity asset store , trying video playing sound - not. here script plays video --

using unityengine;  using unityengine.video;    namespace complete360tour {      [addcomponentmenu("complete360tour/media/videomediareactor")] public class videomediareactor : monobehaviour, imediaswitchreactor<videomedianodedata> {          //-----------------------------------------------------------------------------------------          // inspector variables:          //-----------------------------------------------------------------------------------------            [header("assignment")] [serializefield] protected mediaview mediaview;          [serializefield] protected videoplayer videoplayer;            //-----------------------------------------------------------------------------------------          // private fields:          //-----------------------------------------------------------------------------------------            private rendertexture rendertexture;            //-----------------------------------------------------------------------------------------          // unity lifecycle:          //-----------------------------------------------------------------------------------------            protected void awake() {              if (mediaview == null) debug.logwarning("no mediaview assigned. please assign mediaview.");          }            //-----------------------------------------------------------------------------------------          // public methods:          //-----------------------------------------------------------------------------------------            public void switchmedia(videomedianodedata data, mediaswitchstates state) {              if (data == null) {                  invalidswitchdata();                  return;              }                switch (state) {                  case mediaswitchstates.beforeswitch: break;                  case mediaswitchstates.switch:                      beginvideo(data.videoclip);                      mediaview.setstereoscopic(data.isstereo);                      break;                  case mediaswitchstates.afterswitch: break;              }          }            public void exitmedia() { invalidswitchdata(); }            //-----------------------------------------------------------------------------------------          // private methods:          //-----------------------------------------------------------------------------------------            private void invalidswitchdata() {              videoplayer.stop();              videoplayer.targettexture = null;                mediaview.setmedia(null);              mediaview.setstereoscopic(false);          }            private void beginvideo(videoclip videoclip) {              rendertexture = new rendertexture((int) videoclip.width, (int) videoclip.height, 0);              videoplayer.clip = videoclip;              videoplayer.targettexture = rendertexture;              mediaview.setmedia(rendertexture);              videoplayer.play();          }      }  }

i tried adding audio stuff following

http://justcode.me/unity2d/how-to-play-videos-on-unity-using-new-videoplayer/

but no luck. audio still wouldn't play.