simplified lambda expresions

app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java

@@ -1685,10 +1685,8 @@ public final class VideoDetailFragment
                 .subscribeOn(Schedulers.io())
                 .onErrorComplete()
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(state -> {
-                    updatePlaybackProgress(
-                            state.getProgressMillis(), info.getDuration() * 1000);
-                }, e -> {
+                .subscribe(state -> updatePlaybackProgress(
+                        state.getProgressMillis(), info.getDuration() * 1000), e -> {
                     // impossible since the onErrorComplete()
                 }, () -> {
                     binding.positionView.setVisibility(View.GONE);

app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java

@@ -500,7 +500,7 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
                                                   final boolean isDurationComplete) {
         if (activity != null && headerBinding != null) {
             playlistOverallDurationSeconds += list.stream()
-                    .mapToLong(x -> x.getDuration())
+                    .mapToLong(StreamInfoItem::getDuration)
                     .sum();
             headerBinding.playlistStreamCount.setText(
                 Localization.concatenateStrings(