ok so i've just received my dh-sd49225t-hn ptz camera and i'm having trouble playing back recordings my nas is offline at the moment so for now i'm trying to save / playback recordings to my local pc on the same network problem i have is that videos save to my pc as dav-file which i can not playback through the camera software when i press the playback tab in the online camera software its like there is no recordings there but when i check the pc file i created i can see the dav video files there if i try to open them to view i get a windows error not supported file surely i should be able to view my recordings from the camera software now just to be clear i have not got a sd card in the camera itself but surly that shouldn't cause this what am i doing wrong any help thanks, john