Windows Phone 7.5 has high-speed media scrubbing!
So everyone talks about how the MS Video app doesn't have that little knub control that allows you to advance backwards and forwards on a video like you can do on iOS/Android. Well this is simply an app limitation. I know because I just played a video inside CrunchyRoll app that had the little knub! It worked exactly like on iOS, perfectly. It just means for whatever reason Microsoft omitted this little UI knub on their app!