i.ytimg.com/vi/Hr1HcGZKKJs/maxresdefault.jpg
] Thumbnail download fails completely if maxresdefault.jpg is not available · Issue #21588 · ytdl-org/-dl · GitHub
BESTBED Wasserbetten Pumpe: Anleitung
] `maxresdefault` doesn't exist sometimes · Issue #340 · yt-dlp/yt-dlp · GitHub
i.ytimg.com/vi/I4j4OGl_XHQ/maxresdefault.jpg
thumbnail link doesn't work in all cases - Stack Overflow
thumbnails extractor
get-thumbnail option gives url to broken images. · Issue #402 · yt-dlp/yt-dlp · GitHub
All about Thumbnail Images as ytimg maxresdefault especially in Search
How To Download Any THUMBNAIL #thumbnail #thumbnails
API — getting video thumbnail · GitHub