.video-container { position: relative; width: 100%; height: 0; padding-bottom: 56.25%; } .video-container video, .video-container .video-js { position: absolute; top: 0; left: 0; width: 100% !important; height: 100% !important; } videojs.Vhs.xhr.beforeRequest = function(options) { options.headers = options.headers || {}; options.headers['X-API-KEY'] = '7sysbs-0d)bdhjsk97h*'; return options; }; var player = videojs('vid1'); player.ima({'adTagUrl': 'https://srv.aso1.net/vast?z=135371'});