No, You can not download thumbnails from non-public or unlisted videos working with our thumbnail grabber. Our YouTube thumbnail downloader only operates with publicly accessible movies. Personal or unlisted video clips involve appropriate authentication and that is over and above the scope of this thumbnail extractor tool. Our mission is https://youtubethumbnailextractor90987.blog5star.com/38851764/the-basic-principles-of-youtube-thumbnail-downloader