What are examples of parsing information from a link?

Question

In contact with

Are there examples of parsing information about a video, for example, by ajax link (as in VKontakte when inserting a link to a video or site)?

Answer 1

made a solution:

function getInfoVideo(url){     
    if(url.length > '7'){
      if(url.match('http://youtube.com') || url.match('https://youtube.com')){
        $.ajax({              
              url: 'https://www.youtube.com/oembed?url='+url+'&format=json',
              type: 'GET',
              dataType: 'jsonp',
              success: function(data){
                // data - all meta for youtube video
              }    
          })
      }   
      //#TODO ADD VK AND COUB
    }     
}