[YouTube] Cache deobfuscation and improve requests made

Fix age restriction extraction
Automatically fixes more things

Author: Stypox

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/ItagItem.java

@@ -94,7 +94,7 @@ public static ItagItem getItag(int itagId) throws ParsingException {
                 return item;
             }
         }
-        throw new ParsingException("itag=" + Integer.toString(itagId) + " not supported");
+        throw new ParsingException("itag=" + itagId + " not supported");
     }
 
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