Private broadcasts end like recordings: Enter keeps, Escape deletes (KeepBroadcastDialog). Privacy read from YouTube; delete = videos.delete (fallback liveBroadcasts.delete on 404). Refs: https://developers.google.com/youtube/v3/docs/videos/delete https://developers.google.com/youtube/v3/live/docs/liveBroadcasts/delete (Unit: private broadcast close-out)

KeepBroadcastDialog.xaml

@@ -0,0 +1,31 @@
+<Window x:Class="ytLive.KeepBroadcastDialog"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Keep this broadcast?" Height="240" Width="460"
+        Icon="/ytLive;component/Assets/llamacasty-icon.png"
+        WindowStartupLocation="CenterOwner" ResizeMode="NoResize"
+        ShowInTaskbar="False" Background="#1a1a2e">
+
+    <Grid Margin="24">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="Auto"/>
+        </Grid.RowDefinitions>
+
+        <TextBlock Grid.Row="0" Text="Keep this broadcast?" FontSize="18" FontWeight="Bold"
+                   Foreground="#e0e0e0" Margin="0,0,0,12"/>
+
+        <TextBlock Grid.Row="1" x:Name="MessageText" TextWrapping="Wrap" Foreground="#a0a0b0" FontSize="13"
+                   Margin="0,0,0,16"/>
+
+        <StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Right">
+            <Button x:Name="DeleteBroadcastButton" Content="Delete" IsCancel="True" Click="Delete_Click"
+                    Style="{StaticResource YtButtonSecondary}" Margin="0,0,8,0"
+                    ToolTip="Esc — delete the recording from YouTube"/>
+            <Button x:Name="KeepBroadcastButton" Content="Keep" IsDefault="True" Click="Keep_Click"
+                    Style="{StaticResource YtButton}" MinWidth="90"
+                    ToolTip="Enter — keep it on YouTube as a private video"/>
+        </StackPanel>
+    </Grid>
+</Window>