For each target, you store metadata containing the URL of a video associated to the specific target
Your application reads the metadata of a target, when such target is recognized by Vuforia
Your application uses the URL in the metadata to connect to a server, to download, and to play the video (for example, http://my_server/my_videos/my_video_001.mp4)
please telll me how can i store video url to the metadata of image target. i don't find that guides in this portal.