Add support for getting uploader URL

src/main/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamInfoItemExtractor.java

@@ -33,6 +33,11 @@ public class SoundcloudStreamInfoItemExtractor implements StreamInfoItemExtracto
         return searchResult.getObject("user").getString("username");
     }
 
+    @Override
+    public String getUploaderUrl() {
+        return searchResult.getObject("user").getString("permalink_url");
+    }
+
     @Override
     public String getUploadDate() throws ParsingException {
         return SoundcloudParsingHelper.toDateString(searchResult.getString("created_at"));

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

@@ -94,6 +94,17 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
         }
     }
 
+    @Override
+    public String getUploaderUrl() throws ParsingException {
+        try {
+            return item.select("div[class=\"yt-lockup-byline\"]").first()
+                    .select("a").first()
+                    .attr("href");
+        } catch (Exception e) {
+            throw new ParsingException("Could not get uploader", e);
+        }
+    }
+
     @Override
     public String getUploadDate() throws ParsingException {
         try {

src/main/java/org/schabi/newpipe/extractor/stream/StreamInfoItemExtractor.java

@@ -31,6 +31,7 @@ public interface StreamInfoItemExtractor extends InfoItemExtractor {
     long getViewCount() throws ParsingException;
 
     String getUploaderName() throws ParsingException;
+    String getUploaderUrl() throws ParsingException;
     String getUploadDate() throws ParsingException;
 
 }