How to get number of video views with YouTube API?

I think, the easiest way, is to get video info in JSON format. If you want to use JavaScript, try jQuery.getJSON()... But I prefer PHP:

<?php$video_ID = 'your-video-ID';$JSON = file_get_contents("https://gdata.youtube.com/feeds/api/videos/{$video_ID}?v=2&alt=json");$JSON_Data = json_decode($JSON);$views = $JSON_Data->{'entry'}->{'yt$statistics'}->{'viewCount'};echo $views;?>

Ref: Youtube API - Retrieving information about a single video

You can use the new YouTube Data API v3

if you retrieve the video, the statistics part contains the viewCount:

from the doc:

https://developers.google.com/youtube/v3/docs/videos#resource

statistics.viewCount / The number of times the video has been viewed.

You can retrieve this info in the client side, or in the server side using some of the client libraries:

https://developers.google.com/youtube/v3/libraries

And you can test the API call from the doc:

https://developers.google.com/youtube/v3/docs/videos/list

Sample:

Request:

GET https://www.googleapis.com/youtube/v3/videos?part=statistics&id=Q5mHPo2yDG8&key={YOUR_API_KEY}Authorization:  Bearer ya29.AHES6ZSCT9BmIXJmjHlRlKMmVCU22UQzBPRuxzD7Zg_09hsGX-JavaScript-User-Agent:  Google APIs Explorer

Response:

200 OK- Show headers -{ "kind": "youtube#videoListResponse", "etag": "\"g-RLCMLrfPIk8n3AxYYPPliWWoo/dZ8K81pnD1mOCFyHQkjZNynHpYo\"", "pageInfo": {  "totalResults": 1,  "resultsPerPage": 1 }, "items": [  {   "id": "Q5mHPo2yDG8",   "kind": "youtube#video",   "etag": "\"g-RLCMLrfPIk8n3AxYYPPliWWoo/4NA7C24hM5mprqQ3sBwI5Lo9vZE\"",   "statistics": {    "viewCount": "36575966",    "likeCount": "127569",    "dislikeCount": "5715",    "favoriteCount": "0",    "commentCount": "20317"   }  } ]}

Version 2 of the API has been deprecated since March 2014, which some of these other answers are using.

Here is a very simple code snippet to get the views count from a video, using JQuery in the YouTube API v3.

You will need to create an API key via Google Developer Console first.

<script>  $.getJSON('https://www.googleapis.com/youtube/v3/videos?part=statistics&id=Qq7mpb-hCBY&key={{YOUR-KEY}}', function(data) {    alert("viewCount: " + data.items[0].statistics.viewCount);  });</script>