How To Get Youtube Video Thumbnail Image

Today I will tell you how to get thumbnail image from a YouTube video. This is required a video id that will you get from video URL. And put this ID in the given URL as shown in the example given below

Get Video ID: 

Dow put this ID in the URL given below

http://img.youtube.com/vi/AvWF2jt44rw/0.jpg

http://img.youtube.com/vi/<insert-youtube-video-id-here>/0.jpg Full Size (480×360)
http://img.youtube.com/vi/<insert-youtube-video-id-here>/1.jpg Small Size(120×90)
http://img.youtube.com/vi/<insert-youtube-video-id-here>/2.jpg Small Size(120×90)
http://img.youtube.com/vi/<insert-youtube-video-id-here>/3.jpg Small Size(120×90)