fix N.pointer exception for getUploaderName()

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

@@ -737,7 +737,8 @@ public class YoutubeStreamExtractor extends StreamExtractor {
 
             @Override
             public String getUploaderName() throws ParsingException {
-                return li.select("span.g-hovercard").first().text();
+                return li.select("span[class*=\"attribution\"").first()
+                        .select("span").first().text();
             }
 
             @Override

src/test/java/org/schabi/newpipe/extractor/services/youtube/YoutubeServiceTest.java

@@ -53,6 +53,6 @@ public class YoutubeServiceTest {
 
     @Test
     public void testGetDefaultKiosk() throws Exception {
-        assertEquals(kioskList.getDefaultKioskExtractor(null).getName(), "Trending");
+        assertEquals(kioskList.getDefaultKioskExtractor(null).getId(), "Trending");
     }
 }

src/test/java/org/schabi/newpipe/extractor/services/youtube/YoutubeStreamExtractorDefaultTest.java

@@ -140,6 +140,12 @@ public class YoutubeStreamExtractorDefaultTest {
     public void testGetRelatedVideos() throws ExtractionException, IOException {
         StreamInfoItemCollector relatedVideos = extractor.getRelatedVideos();
         assertFalse(relatedVideos.getItemList().isEmpty());
+        if(!relatedVideos.getErrors().isEmpty()) {
+            for(Throwable e : relatedVideos.getErrors()) {
+                e.printStackTrace();
+                System.err.println("----------------------");
+            }
+        }
         assertTrue(relatedVideos.getErrors().isEmpty());
     }
 }

src/test/java/org/schabi/newpipe/extractor/services/youtube/YoutubeStreamExtractorGemaTest.java

@@ -36,10 +36,10 @@ import static org.schabi.newpipe.extractor.ServiceList.YouTube;
  * <p>
  * WARNING: Deactivate this Test Case before uploading it to Github, otherwise CI will fail.
  */
-@Ignore
 public class YoutubeStreamExtractorGemaTest {
 
     @Test
+    @Ignore
     public void testGemaError() throws IOException, ExtractionException {
         try {
             NewPipe.init(Downloader.getInstance());