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YouTube Thumbnail Downloader

Extract and download YouTube video thumbnails in every size (maxres, sd, hq, mq, default).

Max thumbnail
Max
1280×720
SD thumbnail
SD
640×480
HQ thumbnail
HQ
480×360
MQ thumbnail
MQ
320×180
Default thumbnail
Default
120×90

Maxres isn't generated for every video. If it's blank, fall back to HQ/SD.