Url of large image of a YouTube video

Question

I\'m interested in getting a preview image of a youtube video for my application I\'m using the url to the previews:

http://img.youtube.com/vi/EqWRZrupLrI/0.jpg

Answer 1

Each of every image has 4 category like

https://img.youtube.com/vi//0.jpg
https://img.youtube.com/vi//1.jpg
https://img.youtube.com/vi//2.jpg
https://img.youtube.com/vi//3.jpg 

Also you can get more image size by this

-- For default

https://img.youtube.com/vi//default.jpg

-- For high quality

https://img.youtube.com/vi//hqdefault.jpg 

-- For medium quality

https://img.youtube.com/vi//mqdefault.jpg

-- For max size

https://img.youtube.com/vi//maxresdefault.jpg