VideoPlayer: Show current open file in the title

Author: https://github.com/sl1m3yy 🔰
Commit: 8006bdf6b4
Pull-request: https://github.com/SerenityOS/serenity/pull/15957
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Applications/VideoPlayer/main.cpp

@@ -25,11 +25,11 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
 
     auto app = TRY(GUI::Application::try_create(arguments));
     auto window = TRY(GUI::Window::try_create());
-    window->set_title("Video Player");
     window->resize(640, 480);
     window->set_resizable(true);
 
     auto main_widget = TRY(window->try_set_main_widget<VideoPlayer::VideoPlayerWidget>(window));
+    main_widget->update_title();
 
     if (!filename.is_empty())
         main_widget->open_file(filename);