intro

To get image cover from YouTube's video, open with this url below

format

Just replace VideoID text below with YouTube's video ID

Size	URL
1280x720	https://img.youtube.com/vi/VideoID/maxresdefault.jpg
640x480	https://img.youtube.com/vi/VideoID/sddefault.jpg
480x360	https://img.youtube.com/vi/VideoID/hqdefault.jpg
320x180	https://img.youtube.com/vi/VideoID/mqdefault.jpg

example

try video url https://www.youtube.com/watch?v=6ITW2jIhoAM copy the video ID "6ITW2jIhoAM", then paste to URL format above. So, when you try to download image cover with 1280x720 size, use this url https://img.youtube.com/vi/6ITW2jIhoAM/maxresdefault.jpg

2019