Grabs large thumbnail from current YouTube or Vimeo links

getVideoThumb.js

    // helper function
    function parseVideoId(link) {
      // parses youtube or vimeo links.. but not vimeo shar
      var urlComesAfter = {
        '\\.be/': function() { return link.split('.be/')[1].replace('/','')},
        'v=': function() { return link.split('v=')[1].replace('/','')},
        'vimeo.com/': function() {
          if (isNaN(parseInt(link.split('/').slice(-1)[0]))) {
            var rawLink = link.split('/');
            return [rawLink[3],rawLink[4]];
          } else {
              return link.split('vimeo.com/')[1].replace('/', '');
            }
        }
      };
      for (var k in urlComesAfter) {
        if ((new RegExp(k).test(link))) {
          return urlComesAfter[k]();
        }
      }
    }

    // Here is the real function
    function getVideoThumb(link, cb) {
      var id = '';
      var imgUrl = {
        'youtube' : function() {
          id = parseVideoId(link);
          if (id) {
            cb('http://img.youtube.com/vi/'+id+'/0.jpg');
          }
        },
        'youtu.be': function() {
          id = parseVideoId(link);
          if (id) {
            cb('http://img.youtube.com/vi/'+id+'/0.jpg');
          }
        },
        'vimeo.com': function() {
          id = parseVideoId(link);

          function getData(reqUrl, cb){
            $.ajax({
              url: reqUrl,
              crossDomain: true,
              dataType: 'jsonp',
              success: function(data){
                cb(data);
              }, 
              error: function(data){
                cb('error');
              }
            });
          };

          if (id) {
            var usrUrl = 'http://vimeo.com/api/v2/_id0_/videos.json';
            var vidUrl = 'http://vimeo.com/api/v2/video/_id_.json';
            var qryStr = '';
            if (typeof id === "object") {
              var reqUrl = usrUrl.replace('_id0_', id[0]);
              qryStr = id[1];
            } else {
              var reqUrl = vidUrl.replace('_id_', id);
            }
            getData(reqUrl, function(res) {
              // there's gots to be a better way to knock this out?
              // todo: fix it
              if (res.length > 1) {
                for (var x in res) {
                  var title = res[x].title.replace(/\s+/g, '').replace(/\//g,'').toLowerCase();
                  if (new RegExp(qryStr).test(title)) {
                    var reqUrl = vidUrl.replace('_id_', res[x].id);
                    getData(reqUrl, function() {
                      cb(res[0].thumbnail_large);
                      return;
                    });
                    return;
                  }
                }
              } else {
                cb(res[0].thumbnail_large);
              }
            });
          }
        }
      };

      for (var k in imgUrl) {
        if ((new RegExp(k).test(link))) {
            return imgUrl[k]();
        }
      }
    }