pre-prepare video in scene before its needed

So I am building a VR video viewer that will only have one video in it. I have a main menu scene, and then the VR video player scene, where I am getting the video from a URL, and I would love to have the video already prepared by this time. So I want to start preparing the video the second the app starts up to give the user a pretty good head start by the time they want to watch the video. Is there a temp file or a streamingAssets I can access where the video files are held, say if I prepare it on a different videoplayer ? If I made a do not destroy video player preparing the video, would I be able to access the video through videoPlayer.clip to play the same video on a different player? or will it just take the link and start downloading it fresh? Seem's like something someone has had to of dealt with already so I had to see if someone has a great solution to this.