Every once and a while when I try WILD after some time a tunnel appears. At the end of the tunnel there is either an image or a video. Could somebody please explain?
Could you please detail? The image or video are certainly hypnagogic imagery but there isn’t enough information in your post for us to understand exactly what you describe.
Try focussing on them, and they might eventually become vivid enough that you can step into them. Then you will be in your dream. The point at which you can step in will be instinctual. I’ve done it a few times now.