How to download YouTube Thumbnains

Have you ever found a nice Youtube thumbnail and thought to download it, but didn't know how to do it?
Well in this post you will find out how you can download the original size of a Youtube thumbnail that you want.

1. Click on the video you want thumbnail from.
2. Press and hold "Ctrl" and then click on the letter "U" (Ctrl+U).
3. Press and hold "Ctrl" and then click on the letter "F" (Ctrl+F).
4. Copy "thumbnailurl" and paste in the small search box (usually at the bottom of the page).
5. Click on the URL next to thumbnailurl.

6. Right click on the image and click on "Save image as".

If you are a Youtuber then you migh ask what's the best custom thumbnail size?
Well, what I have found the most perfect size was 791x483 (Width=791pixels and Height 483pixels).