Update YouTubeExtractor.java

set use cache = true will fix this issue HaarigerHarald#225

youtubeExtractor/src/main/java/at/huber/youtubeExtractor/YouTubeExtractor.java

@@ -206,6 +206,7 @@ private SparseArray<YtFile> getStreamUrls() throws IOException, InterruptedExcep
         try {
             urlConnection = (HttpURLConnection) getUrl.openConnection();
             urlConnection.setRequestProperty("User-Agent", USER_AGENT);
+            urlConnection.setUseCaches(true);
             reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
             StringBuilder sbPageHtml = new StringBuilder();
             String line;