diff --git a/FoxTube/Assets/Data/Patchnotes.xml b/FoxTube/Assets/Data/Patchnotes.xml
index 8a84cae..81216eb 100644
--- a/FoxTube/Assets/Data/Patchnotes.xml
+++ b/FoxTube/Assets/Data/Patchnotes.xml
@@ -3,6 +3,7 @@
   <item time="2019-04-06" version="0.5">
     <content>
       <en-US>### What's new:
+- App optimization
 - Changelog notification now pops up after update at first launch
 - Added ability to add videos to playlists on video page
 - Added ability to add videos to playlists through card's context menu
@@ -14,6 +15,7 @@
 - Some items were moved from menu to header
       </en-US>
       <ru-RU>### Что нового:
+- Оптимизация приложения
 - Добавлено уведомление со списком изменений при первом запуске после обновления
 - Добавлена возможность добавлять видео в плейлисты на странице просмотра
 - Добавлена возможность добавлять видео в плейлисты через контекстное меню карточки
diff --git a/FoxTube/Classes/Methods.cs b/FoxTube/Classes/Methods.cs
index 4be9f0a..f6ebd82 100644
--- a/FoxTube/Classes/Methods.cs
+++ b/FoxTube/Classes/Methods.cs
@@ -42,10 +42,13 @@ namespace FoxTube
 
         public static Uri ToUri(this string url)
         {
-            return new Uri(url);
+            if (string.IsNullOrWhiteSpace(url))
+                return null;
+            else
+                return new Uri(url);
         }
 
-        public static string GuardFromNull(this string str)
+        public static string GuardFromNull(string str)
         {
             if (string.IsNullOrWhiteSpace(str))
                 return string.Empty;
@@ -53,11 +56,6 @@ namespace FoxTube
                 return str;
         }
 
-        public static bool IsNullOrWhiteSpace(this string str)
-        {
-            return string.IsNullOrWhiteSpace(str);
-        }
-
         public static string GetChars(this string str, int count)
         {
             try
diff --git a/FoxTube/Controls/Adverts/CardAdvert.xaml.cs b/FoxTube/Controls/Adverts/CardAdvert.xaml.cs
index bb4c976..c39c37a 100644
--- a/FoxTube/Controls/Adverts/CardAdvert.xaml.cs
+++ b/FoxTube/Controls/Adverts/CardAdvert.xaml.cs
@@ -47,19 +47,19 @@ namespace FoxTube.Controls.Adverts
 
             icon.ProfilePicture = advert.AdIcon == null ? null : advert.AdIcon.Source;
 
-            sponsor.Text = advert.SponsoredBy.GuardFromNull();
+            sponsor.Text = Methods.GuardFromNull(advert.SponsoredBy);
 
-            if (advert.CallToActionText.IsNullOrWhiteSpace())
+            if (string.IsNullOrWhiteSpace(advert.CallToActionText))
                 (info.Parent as FrameworkElement).Visibility = Visibility.Collapsed;
             else
                 info.Text = advert.CallToActionText;
 
             desc.Text = string.Empty;
 
-            if (!advert.Price.IsNullOrWhiteSpace())
+            if (!string.IsNullOrWhiteSpace(advert.Price))
                 desc.Text += advert.Price;
 
-            if (!advert.Rating.IsNullOrWhiteSpace())
+            if (!string.IsNullOrWhiteSpace(advert.Rating))
                 desc.Text += " " + advert.Rating;
 
             show.Begin();
diff --git a/FoxTube/Controls/Adverts/CommentAdvert.xaml b/FoxTube/Controls/Adverts/CommentAdvert.xaml
index 39d1fc2..babef6c 100644
--- a/FoxTube/Controls/Adverts/CommentAdvert.xaml
+++ b/FoxTube/Controls/Adverts/CommentAdvert.xaml
@@ -18,8 +18,9 @@
                 <TextBlock Text="Sponsored by" Foreground="White" TextWrapping="WrapWholeWords" FontSize="13" Margin="3,0,3,3"/>
             </Border>
             <TextBlock Name="meta" Text="" TextWrapping="WrapWholeWords" Foreground="Gray" FontSize="13"/>
-            <TextBlock Name="title" Text="Title" TextWrapping="WrapWholeWords" Style="{StaticResource SubtitleTextBlockStyle}"/>
+            <TextBlock Name="title" Text="Title" TextWrapping="WrapWholeWords" FontWeight="Bold"/>
             <TextBlock Name="description" Text="Description" TextWrapping="WrapWholeWords"/>
+            <HyperlinkButton Name="privacy"/>
 
             <Button Name="cta" Content="CALL TO ACTION TEXT" Margin="0,5"/>
         </StackPanel>
diff --git a/FoxTube/Controls/Adverts/CommentAdvert.xaml.cs b/FoxTube/Controls/Adverts/CommentAdvert.xaml.cs
index c450839..4cdac3a 100644
--- a/FoxTube/Controls/Adverts/CommentAdvert.xaml.cs
+++ b/FoxTube/Controls/Adverts/CommentAdvert.xaml.cs
@@ -39,15 +39,19 @@ namespace FoxTube.Controls.Adverts
         private void Initialize()
         {
             title.Text = advert.Title;
-            description.Text = advert.Description.GuardFromNull();
+            description.Text = Methods.GuardFromNull(advert.Description);
             icon.ProfilePicture = advert.AdIcon == null ? null : advert.AdIcon.Source;
 
-            cta.Content = advert.CallToActionText.GuardFromNull();
-            cta.Visibility = advert.CallToActionText.IsNullOrWhiteSpace() ? Visibility.Collapsed : Visibility.Visible;
+            privacy.NavigateUri = advert.PrivacyUrl.ToUri();
+            privacy.Content = advert.PrivacyUrl;
+            privacy.Visibility = string.IsNullOrWhiteSpace(advert.PrivacyUrl) ? Visibility.Collapsed : Visibility.Visible;
+
+            cta.Content = Methods.GuardFromNull(advert.CallToActionText);
+            cta.Visibility = string.IsNullOrWhiteSpace(advert.CallToActionText) ? Visibility.Collapsed : Visibility.Visible;
 
             meta.Text += advert.Price;
             meta.Text += " " + advert.Rating;
-            meta.Visibility = meta.Text.IsNullOrWhiteSpace() ? Visibility.Collapsed : Visibility.Visible;
+            meta.Visibility = string.IsNullOrWhiteSpace(meta.Text) ? Visibility.Collapsed : Visibility.Visible;
         }
     }
 }
diff --git a/FoxTube/Controls/Chat.xaml b/FoxTube/Controls/Chat.xaml
index 7082a0e..8537b9c 100644
--- a/FoxTube/Controls/Chat.xaml
+++ b/FoxTube/Controls/Chat.xaml
@@ -4,6 +4,7 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:controls="using:FoxTube.Controls"
     mc:Ignorable="d"
     d:DesignHeight="600"
     d:DesignWidth="400">
@@ -26,7 +27,7 @@
 
         <ListView Name="list" Grid.Row="1" SelectionMode="None">
             <ListView.ItemTemplate>
-                <DataTemplate>
+                <DataTemplate x:DataType="controls:ChatMessage">
                     <Border BorderBrush="Red" BorderThickness="{Binding Path=BorderThickness}" CornerRadius="5" HorizontalAlignment="Stretch" Background="{Binding Path=Background}" Margin="0,2">
                         <Grid Margin="0,5,5,0">
                             <Grid.ColumnDefinitions>
@@ -62,7 +63,12 @@
                                 </FontIcon>
                             </StackPanel>
                             <StackPanel Orientation="Horizontal" Grid.Column="1" VerticalAlignment="Top" Margin="0,0,5,0">
-                                <HyperlinkButton Content="{Binding Path=Author}" Tag="{Binding Path=ChannelId}" Grid.Column="1" Margin="0,-6,0,0" FontWeight="Bold" Click="HyperlinkButton_Click"/>
+                                <HyperlinkButton Tag="{Binding Path=ChannelId}" Margin="0,-6,0,0" FontWeight="Bold" Click="HyperlinkButton_Click">
+                                    <ToolTipService.ToolTip>
+                                        <TextBlock Text="{Binding Path=Author}" Style="{StaticResource CaptionTextBlockStyle}"/>
+                                    </ToolTipService.ToolTip>
+                                    <TextBlock TextTrimming="CharacterEllipsis" MaxWidth="150" Text="{Binding Path=Author}"/>
+                                </HyperlinkButton>
                                 <TextBlock Text=":"/>
                             </StackPanel>
                             <GroupItem Content="{Binding Path=Message}" Grid.Column="2"/>
diff --git a/FoxTube/Controls/Chat.xaml.cs b/FoxTube/Controls/Chat.xaml.cs
index 1f95fda..911a241 100644
--- a/FoxTube/Controls/Chat.xaml.cs
+++ b/FoxTube/Controls/Chat.xaml.cs
@@ -9,6 +9,9 @@ using Microsoft.AppCenter.Analytics;
 using System.Collections.Generic;
 using Windows.UI.Popups;
 using Windows.ApplicationModel.Resources;
+using Microsoft.Advertising.WinRT.UI;
+using Windows.UI.Xaml.Media.Imaging;
+using System.Linq;
 
 namespace FoxTube.Controls
 {
@@ -68,17 +71,24 @@ namespace FoxTube.Controls
 
     public sealed partial class Chat : UserControl
     {
+        NativeAdsManagerV2 manager = new NativeAdsManagerV2(SecretsVault.AppId, SecretsVault.AdUnitId);
+        public NativeAdV2 advert;
         string chatId;
         DateTime lastInsert;
 
         LiveChatMessagesResource.ListRequest request;
         LiveChatMessageListResponse response;
 
-        DispatcherTimer timer = new DispatcherTimer()
+        DispatcherTimer timer = new DispatcherTimer
         {
             Interval = TimeSpan.FromSeconds(1)
         };
 
+        DispatcherTimer adTimer = new DispatcherTimer
+        {
+            Interval = TimeSpan.FromMinutes(5)
+        };
+
         public Chat(string id)
         {
             InitializeComponent();
@@ -90,6 +100,132 @@ namespace FoxTube.Controls
 
             timer.Tick += Update;
             timer.Start();
+
+            if (SecretsVault.AdsDisabled)
+                return;
+
+            adTimer.Tick += (s, e) => manager.RequestAd();
+            adTimer.Start();
+
+            manager.AdReady += AdReady;
+            manager.ErrorOccurred += ErrorOccurred;
+        }
+
+        private void ErrorOccurred(object sender, NativeAdErrorEventArgs e)
+        {
+            System.Diagnostics.Debug.WriteLine("Error has occured while loading ad");
+        }
+
+        private void AdReady(object sender, NativeAdReadyEventArgs e)
+        {
+            advert = e.NativeAd;
+
+            Grid grid = new Grid
+            {
+                Margin = new Thickness(0, 5, 5, 5),
+            };
+
+            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) });
+            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) });
+            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
+
+            StackPanel iconStack = new StackPanel
+            {
+                Orientation = Orientation.Horizontal,
+                VerticalAlignment = VerticalAlignment.Top,
+                Margin = new Thickness(5, 0, 5, 0)
+            };
+
+            iconStack.Children.Add(new PersonPicture
+            {
+                Height = 20,
+                ProfilePicture = advert.AdIcon == null ? null : advert.AdIcon.Source
+            });
+            FontIcon sponsor = new FontIcon
+            {
+                Glyph = "\xE735",
+                Margin = new Thickness(2, 0, 2, 0)
+            };
+            ToolTipService.SetToolTip(sponsor, ResourceLoader.GetForCurrentView("Chat").GetString("/Chat/sponsor/Text"));
+            iconStack.Children.Add(sponsor);
+
+            StackPanel nameStack = new StackPanel
+            {
+                Orientation = Orientation.Horizontal,
+                VerticalAlignment = VerticalAlignment.Top,
+                Margin = new Thickness(0, 0, 2, 0)
+            };
+            Grid.SetColumn(nameStack, 1);
+            HyperlinkButton sponsorName = new HyperlinkButton
+            {
+                Margin = new Thickness(0, -6, 0, 0),
+                FontWeight = Windows.UI.Text.FontWeights.Bold,
+                Content = new TextBlock
+                {
+                    TextTrimming = TextTrimming.CharacterEllipsis,
+                    MaxWidth = 150,
+                    Text = Methods.GuardFromNull(advert.SponsoredBy)
+                }
+            };
+            ToolTipService.SetToolTip(sponsorName, Methods.GuardFromNull(advert.SponsoredBy));
+            nameStack.Children.Add(sponsorName);
+            nameStack.Children.Add(new TextBlock { Text = ":" });
+
+            StackPanel contentStack = new StackPanel
+            {
+                Padding = new Thickness(2, 0, 0, 0)
+            };
+            Grid.SetColumn(contentStack, 2);
+            contentStack.Children.Add(new TextBlock
+            {
+                VerticalAlignment = VerticalAlignment.Top,
+                TextWrapping = TextWrapping.WrapWholeWords,
+                FontWeight = Windows.UI.Text.FontWeights.Bold,
+                Text = advert.Title
+            });
+            if(!string.IsNullOrWhiteSpace(advert.Description))
+                contentStack.Children.Add(new TextBlock
+                {
+                    VerticalAlignment = VerticalAlignment.Top,
+                    TextWrapping = TextWrapping.WrapWholeWords,
+                    Text = advert.Description
+                });
+            if (!string.IsNullOrWhiteSpace(advert.CallToActionText))
+                contentStack.Children.Add(new HyperlinkButton
+                {
+                    VerticalAlignment = VerticalAlignment.Top,
+                    Content = new TextBlock
+                    {
+                        TextWrapping = TextWrapping.WrapWholeWords,
+                        Text = advert.CallToActionText
+                    }
+                });
+
+            grid.Children.Add(iconStack);
+            grid.Children.Add(nameStack);
+            grid.Children.Add(contentStack);
+
+            ListViewItem item = new ListViewItem
+            {
+                Content = new Border
+                {
+                    BorderBrush = new SolidColorBrush(Colors.Red),
+                    BorderThickness = new Thickness(2),
+                    CornerRadius = new CornerRadius(5),
+                    HorizontalAlignment = HorizontalAlignment.Stretch,
+                    Margin = new Thickness(0, 2, 0, 2),
+                    Background = new SolidColorBrush(Colors.Red) { Opacity = .2 },
+                    Child = grid
+                },
+                Padding = new Thickness(0,25,0,0)
+            };
+
+            list.Items.Insert(0, item);
+
+            if (contentStack.Children.Last() is HyperlinkButton)
+                advert.RegisterAdContainer(item, new List<FrameworkElement> { contentStack.Children.Last() as HyperlinkButton });
+            else
+                advert.RegisterAdContainer(item);
         }
 
         public async void Update(object sender, object e)
diff --git a/FoxTube/Pages/MainPage.xaml.cs b/FoxTube/Pages/MainPage.xaml.cs
index afb86c1..01953d8 100644
--- a/FoxTube/Pages/MainPage.xaml.cs
+++ b/FoxTube/Pages/MainPage.xaml.cs
@@ -179,8 +179,8 @@ namespace FoxTube
                     ToolTipService.SetToolTip(avatar, $"{SecretsVault.UserInfo.Name} ({SecretsVault.UserInfo.Email})");
                     myNameFlyout.Text = SecretsVault.UserInfo.Name;
                     myEmail.Text = SecretsVault.UserInfo.Email;
-                    avatarFlyout.ProfilePicture = new BitmapImage(SecretsVault.UserInfo.Picture.ToUri());
-                    (avatar.Content as PersonPicture).ProfilePicture = avatarFlyout.ProfilePicture;
+                    avatarFlyout.ProfilePicture = new BitmapImage(SecretsVault.UserInfo.Picture.ToUri()) { DecodePixelHeight = 65, DecodePixelWidth = 65 };
+                    (avatar.Content as PersonPicture).ProfilePicture = new BitmapImage(SecretsVault.UserInfo.Picture.ToUri()) { DecodePixelHeight = 25, DecodePixelWidth = 25 };
 
                     avatar.Visibility = Visibility.Visible;
 
diff --git a/FoxTube/Pages/VideoGrid.xaml.cs b/FoxTube/Pages/VideoGrid.xaml.cs
index 029c214..fed042f 100644
--- a/FoxTube/Pages/VideoGrid.xaml.cs
+++ b/FoxTube/Pages/VideoGrid.xaml.cs
@@ -34,7 +34,7 @@ namespace FoxTube.Pages
             (grid.Children[Count % cols + 1] as StackPanel).Children.Add(card);
             Children.Add(card);
 
-            if ((Children.Count - 5) % 20 == 0 && !SecretsVault.AdsDisabled)
+            if ((Children.Count - 5) % 25 == 0 && !SecretsVault.AdsDisabled)
             {
                 CardAdvert advert = new CardAdvert(IsRelatedVideos);
                 (grid.Children[Count % cols + 1] as StackPanel).Children.Add(advert);