问题
I was wondering whether the start, middle and end thumbnails are also available in max resolution?
As descriped in "How do I get a YouTube video thumbnail from the YouTube API" the default thumbnail image is available in max resolution through the url:
http://img.youtube.com/vi/<insert-youtube-video-id-here>/maxresdefault.jpg
Start Thumbnail (120x90 pixels)
http://i1.ytimg.com/vi/G0wGs3useV8/1.jpg
Middle Thumbnail (120x90 pixels)
http://i1.ytimg.com/vi/G0wGs3useV8/2.jpg
End Thumbnail (120x90 pixels)
http://i1.ytimg.com/vi/G0wGs3useV8/3.jpg
If possible I was wondering whether there are also thumbnails for keyframes say e.g. 10s available?
- I'm aware that his is only possible in case that the video is available in high resolution
来源：https://stackoverflow.com/questions/27101276/how-to-get-youtube-start-middle-end-x-sec-thumbnail-in-maximum-resolution