No, You can't download thumbnails from non-public or unlisted videos making use of our thumbnail grabber. Our YouTube thumbnail downloader only will work with publicly out there videos. Private or unlisted video clips need proper authentication which can be outside of the scope of this thumbnail extractor Resource. Our mission https://youtube-thumbnail-grabber47643.blog5.net/86454927/the-smart-trick-of-youtube-thumbnail-downloader-that-no-one-is-discussing