code: function getURLSource(url) {
        var urlRegExp = /(http|https):\/\/(\w+:{0,1}\w*)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%!\-\/]))?/;
        var sources = Object.keys(Embedo.defaults.SOURCES) || [];
  
        if (!urlRegExp.test(url)) {
          return null;
        }
  
        var matched_source = sources
          .filter(function (source) {
            if (Embedo.defaults.SOURCES[source] && url.match(Embedo.defaults.SOURCES[source].REGEX)) {
              return source;
            }
          })
          .filter(Boolean);
  
        return matched_source && matched_source.length ? matched_source[0] : 'iframe';
      }
docs: @function getURLSource
  Checks Source from URI
  
  @param {string} url
  @returns {string}