Make logging of metadata record optional, but default.

contrib/src/main/java/org/archive/modules/extractor/ExtractorYoutubeDL.java

@@ -27,6 +27,7 @@ import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.OutputStream;
 import java.io.RandomAccessFile;
 import java.io.Reader;
 import java.io.UnsupportedEncodingException;
@@ -187,6 +188,19 @@ public class ExtractorYoutubeDL extends Extractor
         this.controller = controller;
     }
 
+    {
+        setLogMetadataRecord(true);
+    }
+    public boolean getLogMetadataRecord() {
+        return (Boolean) kp.get("logMetadataRecord");
+    }
+    /**
+     * Whether or not to create a crawl.log entry for any WARC Metadata Records written.
+     */
+    public void setLogMetadataRecord(boolean logMetadataRecord) {
+        kp.put("logMetadataRecord",logMetadataRecord);
+    }
+
     @Override
     public void start() {
         if (!isRunning) {
@@ -649,6 +663,9 @@ public class ExtractorYoutubeDL extends Extractor
      */
     @Override
     public void postWrite(WARCRecordInfo recordInfo, CrawlURI curi) {
+        if(!this.getLogMetadataRecord())
+            return;
+
         CrawlURI pseudoCuri = null;
         try {
             pseudoCuri = curi.createCrawlURI(recordInfo.getUrl(), LinkContext.EMBED_MISC, Hop.INFERRED);