No, You can not download thumbnails from non-public or unlisted films applying our thumbnail grabber. Our YouTube thumbnail downloader only works with publicly offered video clips. Non-public or unlisted movies have to have proper authentication and that is outside of the scope of the thumbnail extractor Software. Our mission is https://youtubethumbnailgrabber02345.eedblog.com/38649773/the-definitive-guide-to-youtube-thumbnail-grabber