when image target detected the video is play , but when target lost the sound is still play. pls help.

hi , im ccurrenly using unity to built my project . but stuck at the videoplayer and audio when my image target detected my video player is played ( still what i want ) but when target lost the sound is sstill playing until I deetected my image target again . im trying to using videoplayer.pause but when i do that , my image target that detected picture is lost.

here is my code

 // DefaultTrackableEventHandler
 using UnityEngine;
 using UnityEngine.UI;
 using Vuforia;
 using UnityEngine.Video;
 
 
 public class DefaultTrackableEventHandler : MonoBehaviour, ITrackableEventHandler
 {
     public AudioSource soundTarget;
     public AudioClip clipTarget;
     
     private AudioSource[] allAudioSources;
     public Transform TextTargetName;
 
     public Transform TextDescription;
 
     public Transform PanelDescription;
 
 
   
 
     public UnityEngine.UI.Image uploadimage;
 
     public string filepath =" Assets / Resources / resources / image ";
     public VideoClip videoClip;
     public Renderer x;
     
     protected TrackableBehaviour mTrackableBehaviour;
 
     private void StopAllAudio()
     {
         allAudioSources = (Object.FindObjectsOfType(typeof(AudioSource)) as AudioSource[]);
         AudioSource[] array = allAudioSources;
         foreach (AudioSource audioSource in array)
         {
             audioSource.Stop();
         }
     }
 
     private void playSound(string ss)
     {
         clipTarget = (AudioClip)Resources.Load(ss);
         soundTarget.clip = clipTarget;
         soundTarget.loop = false;
         soundTarget.playOnAwake = false;
         soundTarget.Play();
     }
 
     protected virtual void Start()
     {
         mTrackableBehaviour = GetComponent<TrackableBehaviour>();
         if ((bool)mTrackableBehaviour)
         {
             mTrackableBehaviour.RegisterTrackableEventHandler(this);
         }
         
         soundTarget = base.gameObject.AddComponent<AudioSource>();
         var videoPlayer = gameObject.AddComponent<VideoPlayer>();
         var audioSource = gameObject.AddComponent<AudioSource>();
         
         videoPlayer.playOnAwake = false;
         videoPlayer.clip = videoClip;
         videoPlayer.renderMode = VideoRenderMode.MaterialOverride;
         videoPlayer.targetMaterialRenderer = x;
         videoPlayer.targetMaterialProperty = "_MainTex";
         videoPlayer.audioOutputMode = VideoAudioOutputMode.AudioSource;
         videoPlayer.SetTargetAudioSource(0, audioSource);
         
     }
 
     protected virtual void OnDestroy()
     {
         if ((bool)mTrackableBehaviour)
         {
             mTrackableBehaviour.UnregisterTrackableEventHandler(this);
         }
     }
 
     public void OnTrackableStateChanged(TrackableBehaviour.Status previousStatus, TrackableBehaviour.Status newStatus)
     {
         if (newStatus == TrackableBehaviour.Status.DETECTED || newStatus == TrackableBehaviour.Status.TRACKED || newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
         {
             Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " found");
             OnTrackingFound();
            
           
         }
         else if (previousStatus == TrackableBehaviour.Status.TRACKED && newStatus == TrackableBehaviour.Status.NO_POSE)
         {
             Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " lost");
             OnTrackingLost();
            
             
         }
         else
         {
             OnTrackingLost();
         }
         TextTargetName.gameObject.SetActive(value: false);
         uploadimage.gameObject.SetActive(value: false);
         TextDescription.gameObject.SetActive(value: false);
         PanelDescription.gameObject.SetActive(value: false);
        
 
 
     }
     protected virtual void OnTrackingFound()
     {
         Renderer[] componentsInChildren = GetComponentsInChildren<Renderer>(includeInactive: true);
         Collider[] componentsInChildren2 = GetComponentsInChildren<Collider>(includeInactive: true);
         Canvas[] componentsInChildren3 = GetComponentsInChildren<Canvas>(includeInactive: true);
         Renderer[] array = componentsInChildren;
         foreach (Renderer renderer in array)
         {
             renderer.enabled = true;
         }
         Collider[] array2 = componentsInChildren2;
         foreach (Collider collider in array2)
         {
             collider.enabled = true;
         }
         Canvas[] array3 = componentsInChildren3;
         foreach (Canvas canvas in array3)
         {
             canvas.enabled = true;
         }
         if (mTrackableBehaviour.TrackableName == "itsimc")
         {
             VideoPlayer vp = GetComponent<VideoPlayer>();
             if (vp.isPlaying)
             {
                 vp.Stop();
             }
             else
             {
                 vp.Play();
             }
            
         }
         if (mTrackableBehaviour.TrackableName == "STNK")
         {
             playSound("sound/stnksound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "stnkimg");
         }
         if (mTrackableBehaviour.TrackableName == "HELM")
         {
             playSound("sound/helmsound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "helmimg");
         }
         if (mTrackableBehaviour.TrackableName == "SIMCARD")
         {
             playSound("sound/simsound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "simcardimg");
         }
         if (mTrackableBehaviour.TrackableName == "JACKET")
         {
             playSound("sound/jacketsound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "jacketimg");
         }
         if (mTrackableBehaviour.TrackableName == "SARUNGTANGAN")
         {
             playSound("sound/glovessound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "gloveimg");
         }
         if (mTrackableBehaviour.TrackableName == "SEPATU")
         {
             playSound("sound/shoesosund");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "shoesimg");
         }
         if (mTrackableBehaviour.TrackableName == "PAD")
         {
             playSound("sound/padsound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "padimg");
         }
         if (mTrackableBehaviour.TrackableName == "MASKER")
         {
             playSound("sound/maskersound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "maskerimg");
         }
         if (mTrackableBehaviour.TrackableName == "RAINCOAT")
         {
             playSound("sound/coatsound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "raincoat");
         }
         if (mTrackableBehaviour.TrackableName == "HANDPHONE")
         {
             playSound("sound/hapesound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "handphoneimg");
         }
         if (mTrackableBehaviour.TrackableName == "RODA")
         {
             playSound("sound/wheelsound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "wheelimg");
         }
         if (mTrackableBehaviour.TrackableName == "BENSIN")
         {
             playSound("sound/fuelsound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "fuelimg");
         }
         if (mTrackableBehaviour.TrackableName == "SPION")
         {
             playSound("sound/spionsound");
             uploadimage.sprite = Resources.Load<Sprite>(filepath + "spionimg");
         }
      
     }
        
 
     protected virtual void OnTrackingLost()
     {
         
         Renderer[] componentsInChildren = GetComponentsInChildren<Renderer>(includeInactive: true);
         Collider[] componentsInChildren2 = GetComponentsInChildren<Collider>(includeInactive: true);
         Canvas[] componentsInChildren3 = GetComponentsInChildren<Canvas>(includeInactive: true);
         Renderer[] array = componentsInChildren;
         foreach (Renderer renderer in array)
         {
             renderer.enabled = false;
         }
         Collider[] array2 = componentsInChildren2;
         foreach (Collider collider in array2)
         {
             collider.enabled = false;
         }
         Canvas[] array3 = componentsInChildren3;
         foreach (Canvas canvas in array3)
         {
             canvas.enabled = false;
         }
 
        
         StopAllAudio();
     }
     
 }
 

pls help . thanks in advanced.