How do I get a YouTube video thumbnail from the YouTube API?

Each YouTube video has four generated images. They are predictably formatted as follows:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/0.jpghttps://img.youtube.com/vi/<insert-youtube-video-id-here>/1.jpghttps://img.youtube.com/vi/<insert-youtube-video-id-here>/2.jpghttps://img.youtube.com/vi/<insert-youtube-video-id-here>/3.jpg

The first one in the list is a full size image and others are thumbnail images. The default thumbnail image (i.e., one of 1.jpg, 2.jpg, 3.jpg) is:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/default.jpg

For the high quality version of the thumbnail use a URL similar to this:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/hqdefault.jpg

There is also a medium quality version of the thumbnail, using a URL similar to the HQ:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/mqdefault.jpg

For the standard definition version of the thumbnail, use a URL similar to this:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/sddefault.jpg

For the maximum resolution version of the thumbnail use a URL similar to this:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/maxresdefault.jpg

All of the above URLs are available over HTTP too. Additionally, the slightly shorter hostname i3.ytimg.com works in place of img.youtube.com in the example URLs above.

Alternatively, you can use the YouTube Data API (v3) to get thumbnail images.

You can use YouTube Data API to retrieve video thumbnails, caption, description, rating, statistics and more. API version 3 requires a key*. Obtain the key and create a videos: list request:

https://www.googleapis.com/youtube/v3/videos?key=YOUR_API_KEY&part=snippet&id=VIDEO_ID

Example PHP Code

$data = file_get_contents("https://www.googleapis.com/youtube/v3/videos?key=YOUR_API_KEY&part=snippet&id=T0Jqdjbed40");$json = json_decode($data);var_dump($json->items[0]->snippet->thumbnails);

Output

object(stdClass)#5 (5) {  ["default"]=>  object(stdClass)#6 (3) {    ["url"]=>    string(46) "https://i.ytimg.com/vi/T0Jqdjbed40/default.jpg"    ["width"]=>    int(120)    ["height"]=>    int(90)  }  ["medium"]=>  object(stdClass)#7 (3) {    ["url"]=>    string(48) "https://i.ytimg.com/vi/T0Jqdjbed40/mqdefault.jpg"    ["width"]=>    int(320)    ["height"]=>    int(180)  }  ["high"]=>  object(stdClass)#8 (3) {    ["url"]=>    string(48) "https://i.ytimg.com/vi/T0Jqdjbed40/hqdefault.jpg"    ["width"]=>    int(480)    ["height"]=>    int(360)  }  ["standard"]=>  object(stdClass)#9 (3) {    ["url"]=>    string(48) "https://i.ytimg.com/vi/T0Jqdjbed40/sddefault.jpg"    ["width"]=>    int(640)    ["height"]=>    int(480)  }  ["maxres"]=>  object(stdClass)#10 (3) {    ["url"]=>    string(52) "https://i.ytimg.com/vi/T0Jqdjbed40/maxresdefault.jpg"    ["width"]=>    int(1280)    ["height"]=>    int(720)  }}

* Not only that you need a key, you might be asked for billing information depending on the number of API requests you plan to make. However, few million requests per day are free.

Source article.

What Asaph said is right. However, not every YouTube video contains all ninethumbnails. Also, the thumbnails' image sizes depends on the video (the numbersbelow are based on one). There are some thumbnails guaranteed to exist:

Width | Height | URL------|--------|----120   | 90     | https://i.ytimg.com/vi/<VIDEO ID>/1.jpg120   | 90     | https://i.ytimg.com/vi/<VIDEO ID>/2.jpg120   | 90     | https://i.ytimg.com/vi/<VIDEO ID>/3.jpg120   | 90     | https://i.ytimg.com/vi/<VIDEO ID>/default.jpg320   | 180    | https://i.ytimg.com/vi/<VIDEO ID>/mq1.jpg320   | 180    | https://i.ytimg.com/vi/<VIDEO ID>/mq2.jpg320   | 180    | https://i.ytimg.com/vi/<VIDEO ID>/mq3.jpg320   | 180    | https://i.ytimg.com/vi/<VIDEO ID>/mqdefault.jpg480   | 360    | https://i.ytimg.com/vi/<VIDEO ID>/0.jpg480   | 360    | https://i.ytimg.com/vi/<VIDEO ID>/hq1.jpg480   | 360    | https://i.ytimg.com/vi/<VIDEO ID>/hq2.jpg480   | 360    | https://i.ytimg.com/vi/<VIDEO ID>/hq3.jpg480   | 360    | https://i.ytimg.com/vi/<VIDEO ID>/hqdefault.jpg

Additionally, the some other thumbnails may or may not exist. Their presence isprobably based on whether the video is high-quality.

Width | Height | URL------|--------|----640   | 480    | https://i.ytimg.com/vi/<VIDEO ID>/sd1.jpg640   | 480    | https://i.ytimg.com/vi/<VIDEO ID>/sd2.jpg640   | 480    | https://i.ytimg.com/vi/<VIDEO ID>/sd3.jpg640   | 480    | https://i.ytimg.com/vi/<VIDEO ID>/sddefault.jpg1280  | 720    | https://i.ytimg.com/vi/<VIDEO ID>/hq720.jpg1920  | 1080   | https://i.ytimg.com/vi/<VIDEO ID>/maxresdefault.jpg

You can find JavaScript and PHP scripts to retrieve thumbnails and otherYouTube information in:

• How to get YouTube Video Info with PHP
• Retrieve YouTube Video Details using JavaScript - JSON & API v2

You can also use the YouTube Video Information Generator tool to get allthe information about a YouTube video by submitting a URL or video id.