No, You can not download thumbnails from personal or unlisted films working with our thumbnail grabber. Our YouTube thumbnail downloader only is effective with publicly offered video clips. Non-public or unlisted films have to have correct authentication and that is over and above the scope of the thumbnail extractor Instrument. https://youtube-thumbnail-grabber94141.blog-ezine.com/38728772/5-essential-elements-for-youtube-thumbnail-extractor