If you can use MediaPlayerElement (either by creating a WinUI app, or by hosting WinUI MediaPlayerElement in a WPF XamlIsland), then you should be able to easily render your YUV420 video using ...

I have always worked exclusively in C#. I do not use xaml. So for me a common way to add and build a rudimentary hierarchy would be: public partial class App : Application { public App() { } protected ...