Video Url Http Error 405 Can't Download

I have an online video url, I can use vitamio video player play it online, but once I use android HttpUrlConnection download, I failed and received http 405 error.Can anyone give me some help?

 HttpURLConnection conn = null;
 int totalSize = 0;
 conn = (HttpURLConnection) new URL(url).openConnection();
 conn.setConnectTimeout(10 * 1000);
 conn.setRequestMethod("GET");
 conn.connect();
 totalSize = conn.getContentLength();

 [1]:

the url is [the url of a video][1] I put the url on , it displayed right length which is 71917427.