When directly integrating video capture in your Windows Store app you can use the MediaCapture class. There are a number of methods which affect the video but not all will be supported on all devices. One of these is SetPreviewMirroring
This mirrors the preview video so that your image is, well, like a mirror. However I’ve discovered that although the method throws an exception if not supported, it also throws an exception on Surface RT even though it is supported and the video is correctly mirrored. Worse still the GetPreviewMirroring method returns false when the video is currently mirrored 😦
In The Hand Ltd 