Vuforia — how to only play one video when an image is recognized

I have an AR application that has 2 image targets, I’m new at programming and any help would be appreciated. When I scanned the image target which contains the video all of my objects appear from the other image target and the video appears and plays. This occurred when I was Trying to get the video to play when the image target is detected and stop playing when the image not Detected. I was modifying the default Trackable event header as you can see down below. Thank you i added the follwoing lines
public UnityEngine.Video.VideoPlayer VideoPlayer;

VideoPlayer.Play();

VideoPlayer.Stop();

Code (CSharp):

1.  
2. using UnityEngine;
3. using Vuforia;
4.  
5. /// <summary>
6. /// A custom handler that implements the ITrackableEventHandler interface.
7. ///
8. /// Changes made to this file could be overwritten when upgrading the Vuforia version.
9. /// When implementing custom event handler behavior, consider inheriting from this class instead.
10. /// </summary>
11. public class DefaultTrackableEventHandler : MonoBehaviour, ITrackableEventHandler
12. {
13.     public UnityEngine.Video.VideoPlayer VideoPlayer;
14.     #region PROTECTED_MEMBER_VARIABLES
15.  
16.     protected TrackableBehaviour mTrackableBehaviour;
17.     protected TrackableBehaviour.Status m_PreviousStatus;
18.     protected TrackableBehaviour.Status m_NewStatus;
19.  
20.     #endregion // PROTECTED_MEMBER_VARIABLES
21.  
22.     #region UNITY_MONOBEHAVIOUR_METHODS
23.  
24.     protected virtual void Start()
25.     {
26.         mTrackableBehaviour = GetComponent<TrackableBehaviour>();
27.         if (mTrackableBehaviour)
28.             mTrackableBehaviour.RegisterTrackableEventHandler(this);
29.     }
30.  
31.     protected virtual void OnDestroy()
32.     {
33.         if (mTrackableBehaviour)
34.             mTrackableBehaviour.UnregisterTrackableEventHandler(this);
35.     }
36.  
37.     #endregion // UNITY_MONOBEHAVIOUR_METHODS
38.  
39.     #region PUBLIC_METHODS
40.  
41.     /// <summary>
42.     ///     Implementation of the ITrackableEventHandler function called when the
43.     ///     tracking state changes.
44.     /// </summary>
45.     public void OnTrackableStateChanged(
46.         TrackableBehaviour.Status previousStatus,
47.         TrackableBehaviour.Status newStatus)
48.     {
49.         m_PreviousStatus = previousStatus;
50.         m_NewStatus = newStatus;
51.  
52.         if (newStatus == TrackableBehaviour.Status.DETECTED ||
53.             newStatus == TrackableBehaviour.Status.TRACKED ||
54.             newStatus == TrackableBehaviour.Status.EXTENDED_TRACKED)
55.         {
56.             Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " found");
57.             OnTrackingFound();
58.         }
59.         else if (previousStatus == TrackableBehaviour.Status.TRACKED &&
60.                  newStatus == TrackableBehaviour.Status.NO_POSE)
61.         {
62.             Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " lost");
63.             OnTrackingLost();
64.         }
65.         else
66.         {
67.             // For combo of previousStatus=UNKNOWN + newStatus=UNKNOWN|NOT_FOUND
68.             // Vuforia is starting, but tracking has not been lost or found yet
69.             // Call OnTrackingLost() to hide the augmentations
70.             OnTrackingLost();
71.         }
72.     }
73.  
74.     #endregion // PUBLIC_METHODS
75.  
76.     #region PROTECTED_METHODS
77.  
78.     protected virtual void OnTrackingFound()
79.     {
80.         VideoPlayer.Play();
81.         var rendererComponents = GetComponentsInChildren<Renderer>(true);
82.         var colliderComponents = GetComponentsInChildren<Collider>(true);
83.         var canvasComponents = GetComponentsInChildren<Canvas>(true);
84.  
85.         // Enable rendering:
86.         foreach (var component in rendererComponents)
87.             component.enabled = true;
88.  
89.         // Enable colliders:
90.         foreach (var component in colliderComponents)
91.             component.enabled = true;
92.  
93.         // Enable canvas':
94.         foreach (var component in canvasComponents)
95.             component.enabled = true;
96.     }
97.  
98.  
99.     protected virtual void OnTrackingLost()
100.     {
101.         VideoPlayer.Stop();
102.         var rendererComponents = GetComponentsInChildren<Renderer>(true);
103.         var colliderComponents = GetComponentsInChildren<Collider>(true);
104.         var canvasComponents = GetComponentsInChildren<Canvas>(true);
105.  
106.         // Disable rendering:
107.         foreach (var component in rendererComponents)
108.             component.enabled = false;
109.  
110.         // Disable colliders:
111.         foreach (var component in colliderComponents)
112.             component.enabled = false;
113.  
114.         // Disable canvas':
115.         foreach (var component in canvasComponents)
116.             component.enabled = false;
117.     }
118.  
119.     #endregion // PROTECTED_METHODS
120. }
121.