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.cs

@@ -0,0 +1,23 @@
+using System.Windows;
+
+namespace ytLive;
+
+/// <summary>Asked when a PRIVATE broadcast ends — the same contract as the recording's save
+/// dialog (creator ruling 2026-10-09): <b>Enter keeps</b> it on YouTube as a private video,
+/// <b>Escape deletes</b> it. <c>DialogResult == true</c> = keep; false (Delete, Escape, the X)
+/// = delete.</summary>
+public partial class KeepBroadcastDialog : Window
+{
+    public KeepBroadcastDialog(string title)
+    {
+        InitializeComponent();
+        MessageText.Text = string.IsNullOrWhiteSpace(title)
+            ? "Your private broadcast is on YouTube as a private video. Keep it, or delete it?"
+            : $"\u201c{title}\u201d is on YouTube as a private video. Keep it, or delete it?";
+        Loaded += (_, _) => KeepBroadcastButton.Focus();
+    }
+
+    private void Keep_Click(object sender, RoutedEventArgs e) => DialogResult = true;
+
+    private void Delete_Click(object sender, RoutedEventArgs e) => DialogResult = false;
+}