responsive layout

script.js

@@ -8,13 +8,14 @@ document.addEventListener("DOMContentLoaded", () => {
         let xhr = new XMLHttpRequest();
         xhr.addEventListener("load", () => {
             let video = document.createElement("video");
-            video.className = "video-js";
+            video.className = "video-js vjs-big-play-centered";
             body.appendChild(video);
             let ctype = xhr.getResponseHeader("Content-Type");
             console.log(ctype);
             let options = {};
             options.controls = true;
             options.liveui = true;
+            options.responsive = true;
             options.techOrder = ["chromecast", "html5"];
             options.plugins = {};
             options.plugins.chromecast = {};