Xaml 事件媒体元素

有没有一种不用点击按钮就能启动视频（媒体元素）的方式

我的意思是从后面的代码中用绑定之类的东西

<Grid Background="Black"  Width="{Binding Shape.Width}" Height="{Binding Shape.Height}">
        <Grid.Triggers>
            <EventTrigger ...>
                <EventTrigger.Actions>
                    <BeginStoryboard Name="beginStoryboard">
                        <Storyboard>
                            <MediaTimeline Source="C:\riskpart1.wmv" Storyboard.TargetName="video" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger.Actions>
        </Grid.Triggers>

        <MediaElement  x:Name="video" LoadedBehavior="Play" />
    </Grid>

<EventTrigger RoutedEvent="Window.Loaded">