change cipher to signatureCipher (HaarigerHarald#148)

Author: xibr

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

@@ -75,7 +75,7 @@ public abstract class YouTubeExtractor extends AsyncTask<String, Void, SparseArr
     private static final Pattern patItag = Pattern.compile("itag=([0-9]+?)(&|\\z)");
     private static final Pattern patEncSig = Pattern.compile("s=(.{10,}?)(\\\\\\\\u0026|\\z)");
     private static final Pattern patUrl = Pattern.compile("\"url\"\\s*:\\s*\"(.+?)\"");
-    private static final Pattern patCipher = Pattern.compile("\"cipher\"\\s*:\\s*\"(.+?)\"");
+    private static final Pattern patCipher = Pattern.compile("\"signatureCipher\"\\s*:\\s*\"(.+?)\"");
     private static final Pattern patCipherUrl = Pattern.compile("url=(.+?)(\\\\\\\\u0026|\\z)");
 
     private static final Pattern patVariableFunction = Pattern.compile("([{; =])([a-zA-Z$][a-zA-Z0-9$]{0,2})\\.([a-zA-Z$][a-zA-Z0-9$]{0,2})\\(");