public sealed partial class VideoPlay : Page
{
    public VideoPlay()
    {
        this.InitializeComponent();
    }


    private async void CoreWindow_KeyDown(CoreWindow sender, KeyEventArgs args)
    {
        if (args.VirtualKey == Windows.System.VirtualKey.GamepadDPadDown || args.VirtualKey == Windows.System.VirtualKey.GamepadLeftThumbstickDown)
        {
            VideoMenuGrid.Visibility = Visibility.Visible;
            await VideoMenuGrid.Offset(200f, 0f, 1000, 0).StartAsync();
        }
        else if (args.VirtualKey == Windows.System.VirtualKey.GamepadDPadUp || args.VirtualKey == Windows.System.VirtualKey.GamepadLeftThumbstickUp)
        {
            await VideoMenuGrid.Offset(0f, 0f, 1000, 0).StartAsync();
            VideoMenuGrid.Visibility = Visibility.Collapsed;
        }
    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);
        Window.Current.CoreWindow.KeyDown += CoreWindow_KeyDown;
    }
    protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
    {
        base.OnNavigatingFrom(e);
        Window.Current.CoreWindow.KeyDown -= CoreWindow_KeyDown;
    }

}

<Grid >
    <Grid HorizontalAlignment="Stretch"
          Height="200"
          x:Name="VideoMenuGrid"
          Margin="0,-200,0,0"
          VerticalAlignment="Top">
        <Grid.Background>
            <SolidColorBrush Color="Yellow" Opacity="0.5"/>
        </Grid.Background>
    </Grid>
</Grid>