i.ytimg.com/vi/YeLI0myXWBQ/maxresdefault.jpg

maxresdefault thumbnail · Issue #373 · nullscreen/yt · GitHub

thumbnail link doesn't work in all cases - Stack Overflow

i.ytimg.com/vi/T3JLx3qmQkw/maxresdefault.jpg, grab pack

] Thumbnail download fails completely if maxresdefault.jpg is not available · Issue #21588 · ytdl-org/-dl · GitHub

i.ytimg.com/vi/T3JLx3qmQkw/maxresdefault.jpg, grab pack

API — getting video thumbnail · GitHub

i.ytimg.com/vi/I4j4OGl_XHQ/maxresdefault.jpg

MESA para TATUADOR y ANILLADORES, Tattoo Review

i.ytimg.com/vi/T3JLx3qmQkw/maxresdefault.jpg, grab pack