How to download youtube video thumbnails
There are bunch of tools available to download thumbnails of youtube, vimeo sites which you could use for various purposes. The favourite tool I use most of the time is youtube-thumbnial-grabber.com
Just head on to the site using above link. It could be some thing like this
Just paste the url in the input box and just click the Download Thumbnail Images button thats it. It will fetch for you all kinds of thumbnails of various sizes like this
As you can see in the above image you could download images of various size quality. If you are frequent user of downloading thumbnails there are chrome extension and firefox addon which will help you. Using chrome extension is simple you just need to head over to the youtube video you need to download and click the extension, thats it it will take you to the above download page.