Embed the video

contentscript.js

(function(window, $, undefined){  

  function getInfo() {
    var movieInfo = {};
    movieInfo['title'] = $('h1.title').html();
    movieInfo['year'] = $('span.year').html();
    movieInfo['type'] = $('.noreview-col-left h3').html().replace(' Details','');
    return movieInfo;  
  }

  function getVideo(searchQuery) {
    var queryURL = 'https://www.googleapis.com/youtube/v3/search?q='+searchQuery+'&key=<YOUR API KEY HERE>&part=snippet&maxResults=1&type=video&videoEmbeddable=true';
    $.getJSON(queryURL, function(data) {
      var videoId = data.items[0].id.videoId;
      $('#displaypage-overview').append('<div id="yt-trailer"><iframe width="960" height="540" src="//www.youtube.com/embed/'+videoId+'?rel=0" frameborder="0" allowfullscreen></iframe><br><br><a href="https://www.youtube.com/results?search_query='+searchQuery+'" target="_blank">Wrong trailer?</a></div>');
    });
  }

  $('.actions').append('<br><br><span class="btnWrap mltBtn mltBtn-s60"><a id="watch-trailer" href="javascript:void(0);" style="margin-top:-5px" class="svf-button svfb-silver addlk evo-btn svf-button-inq save2add"><span class="inr">Watch Trailer</span></a></span>');
  
  $('#watch-trailer').on('click', function(){
    getVideo(getInfo().title + ' ' + getInfo().year);
  });
  
})(window, jQuery);