WinAmp does both and in this thread here:
What's your favorite media player?
Shows that many people do use WinAmp for both audio and video.
I use WinAmp, Zune or WMP which does both to play my audio and video. Why bother getting a audio specific app when there are apps out there already that do both. Getting foobar would mean that you would have to find a video player. Then you would get one that can do both so why use the single one?
I will add it.