If you have been foolhardy or brave enough to flash one of those leaked Mango ROMs for a variety of HTC Windows Phone 7 handsets you will be able to install HTC’s Connected Media app and actually find it working also.
HTCInside.de published this video showing the video streaming app in action, and the most interesting feature was seeing the app continuing to steam to the television, even when multi-tasking.
Overall the app seems pretty functional, and might make one buy HTC’s DLNA receiver if it is not built into your TV already.
HTC Connected Media can be found in Marketplace here.