diff --git a/app/build.gradle b/app/build.gradle
index 5c73c0936..68498d5a4 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -69,6 +69,10 @@ dependencies {
     implementation "com.android.support:cardview-v7:${supportLibVersion}"
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
 
+    // Originally in NewPipeExtractor
+    implementation 'com.grack:nanojson:1.1'
+    implementation 'org.jsoup:jsoup:1.9.2'
+
     implementation 'ch.acra:acra:4.9.2' //4.11
 
     implementation 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
diff --git a/app/src/main/java/org/schabi/newpipe/MainActivity.java b/app/src/main/java/org/schabi/newpipe/MainActivity.java
index a9f2e9622..b9b2e158a 100644
--- a/app/src/main/java/org/schabi/newpipe/MainActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/MainActivity.java
@@ -73,6 +73,7 @@ public class MainActivity extends AppCompatActivity {
     private DrawerLayout drawer = null;
     private NavigationView drawerItems = null;
     private TextView headerServiceView = null;
+    private Button toggleServiceButton = null;
 
     private boolean servicesShown = false;
     private ImageView serviceArrow;
@@ -266,8 +267,8 @@ public class MainActivity extends AppCompatActivity {
 
         serviceArrow = hView.findViewById(R.id.drawer_arrow);
         headerServiceView = hView.findViewById(R.id.drawer_header_service_view);
-        Button action = hView.findViewById(R.id.drawer_header_action_button);
-        action.setOnClickListener(view -> {
+        toggleServiceButton = hView.findViewById(R.id.drawer_header_action_button);
+        toggleServiceButton.setOnClickListener(view -> {
             toggleServices();
         });
     }
@@ -279,6 +280,7 @@ public class MainActivity extends AppCompatActivity {
         drawerItems.getMenu().removeGroup(R.id.menu_tabs_group);
         drawerItems.getMenu().removeGroup(R.id.menu_options_about_group);
 
+
         if(servicesShown) {
             showServices();
         } else {
@@ -364,6 +366,8 @@ public class MainActivity extends AppCompatActivity {
             String selectedServiceName = NewPipe.getService(
                     ServiceHelper.getSelectedServiceId(this)).getServiceInfo().getName();
             headerServiceView.setText(selectedServiceName);
+            toggleServiceButton.setContentDescription(
+                    getString(R.string.drawer_header_description) + selectedServiceName);
         } catch (Exception e) {
             ErrorActivity.reportUiError(this, e);
         }
@@ -557,6 +561,14 @@ public class MainActivity extends AppCompatActivity {
         }
     }
 
+    private void updateDrawerHeaderString(String content) {
+        NavigationView navigationView = findViewById(R.id.navigation);
+        View hView =  navigationView.getHeaderView(0);
+        Button action = hView.findViewById(R.id.drawer_header_action_button);
+
+        action.setContentDescription(content);
+    }
+
     private void handleIntent(Intent intent) {
         try {
             if (DEBUG) Log.d(TAG, "handleIntent() called with: intent = [" + intent + "]");
diff --git a/app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java b/app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java
index f77daa092..9f9dce259 100644
--- a/app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java
+++ b/app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java
@@ -359,6 +359,7 @@ public class DownloadDialog extends DialogFragment implements RadioGroup.OnCheck
         toolbar.setNavigationIcon(isLight ? R.drawable.ic_arrow_back_black_24dp : R.drawable.ic_arrow_back_white_24dp);
         toolbar.inflateMenu(R.menu.dialog_url);
         toolbar.setNavigationOnClickListener(v -> getDialog().dismiss());
+        toolbar.setNavigationContentDescription(R.string.cancel);
 
         okButton = toolbar.findViewById(R.id.okay);
         okButton.setEnabled(false);// disable until the download service connection is done
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java
index 5c5fd8635..7aeafb4a2 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java
@@ -159,6 +159,7 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
 
         viewPager.setOffscreenPageLimit(pagerAdapter.getCount());
         updateTabsIcon();
+        updateTabsContentDescription();
         updateCurrentTitle();
     }
 
@@ -171,6 +172,17 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
         }
     }
 
+    private void updateTabsContentDescription() {
+        for (int i = 0; i < tabsList.size(); i++) {
+            final TabLayout.Tab tabToSet = tabLayout.getTabAt(i);
+            if (tabToSet != null) {
+                final Tab t = tabsList.get(i);
+                tabToSet.setIcon(t.getTabIconRes(activity));
+                tabToSet.setContentDescription(t.getTabName(activity));
+            }
+        }
+    }
+
     private void updateCurrentTitle() {
         setTitle(tabsList.get(viewPager.getCurrentItem()).getTabName(requireContext()));
     }
diff --git a/app/src/main/java/us/shandian/giga/get/DownloadRunnable.java b/app/src/main/java/us/shandian/giga/get/DownloadRunnable.java
index 8126cc7e8..f5b9b06d4 100644
--- a/app/src/main/java/us/shandian/giga/get/DownloadRunnable.java
+++ b/app/src/main/java/us/shandian/giga/get/DownloadRunnable.java
@@ -117,7 +117,9 @@ public class DownloadRunnable extends Thread {
                     byte[] buf = new byte[DownloadMission.BUFFER_SIZE];
                     int len;
 
-                    while (start < end && mMission.running && (len = is.read(buf, 0, buf.length)) != -1) {
+                    // use always start <= end
+                    // fixes a deadlock in DownloadRunnable because youtube is sending one byte alone after downloading 26MiB exactly
+                    while (start <= end && mMission.running && (len = is.read(buf, 0, buf.length)) != -1) {
                         f.write(buf, 0, len);
                         start += len;
                         block.done += len;
diff --git a/app/src/main/res/layout-v21/drawer_header.xml b/app/src/main/res/layout-v21/drawer_header.xml
index 4474ee4ed..22e81883d 100644
--- a/app/src/main/res/layout-v21/drawer_header.xml
+++ b/app/src/main/res/layout-v21/drawer_header.xml
@@ -9,6 +9,7 @@
         android:id="@+id/drawer_header_action_button"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:contentDescription="@string/drawer_header_description"
         android:background="?android:attr/selectableItemBackground" />
 
     <ImageView
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 6d1c68ef1..abdbc8666 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -32,7 +32,7 @@
     <string name="settings_category_video_audio_title">Video &amp; Audio</string>
     <string name="content_language_title">Bevorzugte Sprache des Inhalts</string>
     <string name="list_thumbnail_view_description">Video-Vorschaubild</string>
-    <string name="detail_thumbnail_view_description">Video-Vorschaubild</string>
+    <string name="detail_thumbnail_view_description">Video abspielen, dauer</string>
     <string name="detail_uploader_thumbnail_view_description">Nutzerbild</string>
     <string name="detail_dislikes_img_view_description">Gefällt nicht</string>
     <string name="detail_likes_img_view_description">Gefällt</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 12ad9bce0..513c4b711 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -228,7 +228,7 @@
     <string name="error_details_headline">Details:</string>
     <!-- Content descriptions (for better accessibility) -->
     <string name="list_thumbnail_view_description">Video preview thumbnail</string>
-    <string name="detail_thumbnail_view_description">Video preview thumbnail</string>
+    <string name="detail_thumbnail_view_description">Play video, duration:</string>
     <string name="detail_uploader_thumbnail_view_description">Uploader\'s avatar thumbnail</string>
     <string name="detail_likes_img_view_description">Likes</string>
     <string name="detail_dislikes_img_view_description">Dislikes</string>
@@ -250,6 +250,7 @@
     <string name="short_thousand">K</string>
     <string name="short_million">M</string>
     <string name="short_billion">B</string>
+    <string name="drawer_header_description">Toggle service, currently selected:</string>
     <!--Zero don't get selected (in some languages) as it is not a "special case" for android-->
     <string name="no_subscribers">No subscribers</string>
     <plurals name="subscribers">
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 5084c008b..e2a99f5b5 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,8 +1,6 @@
-#Fri Mar 30 10:42:05 CEST 2018
+#Sun Sep 22 10:40:45 CEST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
 distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
-distributionSha256Sum=9af7345c199f1731c187c96d3fe3d31f5405192a42046bafa71d846c3d9adacb
-#distributionSha256Sum must be updated along with the version of gradle in distributionUrl