When child of CoordinatorLayout wants focus, show it!

The same logic is present in RecyclerView, ScrollView etc.
Android really should default to this behavior for all Views
with isScrollContainer = true

app/src/main/java/org/schabi/newpipe/views/FocusAwareCoordinator.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) Eltex ltd 2019 <eltex@eltex-co.ru>
+ * FocusAwareCoordinator.java is part of NewPipe.
+ *
+ * NewPipe is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * NewPipe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.schabi.newpipe.views;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
+
+public final class FocusAwareCoordinator extends CoordinatorLayout {
+    private final Rect childFocus = new Rect();
+
+    public FocusAwareCoordinator(@NonNull Context context) {
+        super(context);
+    }
+
+    public FocusAwareCoordinator(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public FocusAwareCoordinator(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @Override
+    public void requestChildFocus(View child, View focused) {
+        super.requestChildFocus(child, focused);
+
+        if (!isInTouchMode()) {
+            if (focused.getHeight() >= getHeight()) {
+                focused.getFocusedRect(childFocus);
+
+                ((ViewGroup) child).offsetDescendantRectToMyCoords(focused, childFocus);
+            } else {
+                focused.getHitRect(childFocus);
+
+                ((ViewGroup) child).offsetDescendantRectToMyCoords((View) focused.getParent(), childFocus);
+            }
+
+            requestChildRectangleOnScreen(child, childFocus, false);
+        }
+    }
+}

app/src/main/res/layout-large-land/fragment_video_detail.xml

@@ -10,7 +10,7 @@
 	android:orientation="horizontal"
 	android:baselineAligned="false">
 
-	<androidx.coordinatorlayout.widget.CoordinatorLayout
+	<org.schabi.newpipe.views.FocusAwareCoordinator
 		android:id="@+id/detail_main_content"
 		android:layout_width="0dp"
 		android:layout_height="match_parent"
@@ -526,7 +526,7 @@
 
 		</com.google.android.material.tabs.TabLayout>
 
-	</androidx.coordinatorlayout.widget.CoordinatorLayout>
+	</org.schabi.newpipe.views.FocusAwareCoordinator>
 
 	<FrameLayout
 		android:id="@+id/relatedStreamsLayout"