Repro Steps:

1) Create a Page
2) Import a Video file into the Project.
3) Drag the Video File onto the Page.
Observe the speed at which the video plays.

4) Navigate to the MediaElement that contains the video within the Navigator, and select it.
5) In the Properties for the MediaElement, change the SpeedRatio value to a positive number.

Observe how playback speed is not affected by the SpeedRatio value.

Expected Results: The rate at which the video progresses increases as the SpeedRatio property is increased, with a higher SpeedRatio resulting in accelerated playback speed.