Gets or sets the vertical alignment of the video from the VideoBrush.
<object AlignmentY="AlignmentY" .../>
value = object.AlignmentY
object.AlignmentY = value
A value of the enumeration that specifies the vertical position of the video.
This property is read/write. The default value is Center.
In addition to AlignmentX and AlignmentY, the Stretch property also affects the portion of the source that will apply to the target region.