Improve age restriction and yt restricted content strings

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

@@ -1551,7 +1551,8 @@ public class VideoDetailFragment
     }
 
     private void hideAgeRestrictedContent() {
-        showError(getString(R.string.restricted_video), false);
+        showError(getString(R.string.restricted_video,
+                getString(R.string.show_age_restricted_content_title)), false);
 
         if (relatedStreamsLayout != null) { // tablet
             relatedStreamsLayout.setVisibility(View.INVISIBLE);

app/src/main/res/values/strings.xml

@@ -154,10 +154,11 @@
     <string name="popup_playing_append">Queued on popup player</string>
     <string name="c3s_url" translatable="false">https://www.c3s.cc/</string>
     <string name="content">Content</string>
-    <string name="show_age_restricted_content_title">Age restricted content</string>
-    <string name="video_is_age_restricted">Show age restricted video. Future changes are possible from the settings.</string>
-    <string name="youtube_restricted_mode_enabled_title">YouTube restricted mode</string>
-    <string name="restricted_video">This video is age restricted.\n\nTurn on \"Age restricted content\" in the settings if you want to see it.</string>
+    <string name="show_age_restricted_content_title">Show age restricted content</string>
+    <string name="show_age_restricted_content_summary">Show content possibly unsuitable for children because it has an age limit (like 18+).</string>
+    <string name="youtube_restricted_mode_enabled_title">Turn on YouTube\'s \"Restricted Mode\"</string>
+    <string name="youtube_restricted_mode_enabled_summary">YouTube provides a \"Restricted Mode\" which hides potentially mature content.</string>
+    <string name="restricted_video">This video is age restricted.\n\nTurn on \"%1$s\" in the settings if you want to see it.</string>
     <string name="duration_live">Live</string>
     <string name="downloads">Downloads</string>
     <string name="downloads_title">Downloads</string>

app/src/main/res/xml/content_settings.xml

@@ -49,13 +49,15 @@
         app:iconSpaceReserved="false"
         android:defaultValue="false"
         android:key="@string/show_age_restricted_content"
-        android:title="@string/show_age_restricted_content_title"/>
+        android:title="@string/show_age_restricted_content_title"
+        android:summary="@string/show_age_restricted_content_summary"/>
 
     <SwitchPreferenceCompat
         app:iconSpaceReserved="false"
         android:defaultValue="false"
         android:key="@string/youtube_restricted_mode_enabled"
-        android:title="@string/youtube_restricted_mode_enabled_title"/>
+        android:title="@string/youtube_restricted_mode_enabled_title"
+        android:summary="@string/youtube_restricted_mode_enabled_summary"/>
 
     <SwitchPreferenceCompat
         app:iconSpaceReserved="false"