With this service you can retrieve video thumbnails from youtube videos.
To start, just put some youtube url into input box and hit [Get images] btn.
Another way to fast get images is to send youtube video id through URL:
SCHEMA
https://md5calc.com/youtube/thumbs/<VIDEO_ID>
EXAMPLE (open):
https://md5calc.com/youtube/thumbs/Pgmx7z49OEk