After taking out the power cable and again removing the microSD before attaching the power cable the RTSP seems to available and I can play the streams with mplayer from computer and VLC from my...

@Solla-topee I did some more testing on this and it seems that once I put in the microSD card RTSP will be disabled and even when I remove the card RTSP remains disabled. Even after a reset the RTSP...

Thanks @Solla-topee, Resetting the device multiple times did the trick and now I'm able to access the RTSP stream Lot off hassle but now it seems to be working as expected

The RTSP streaming i.e. NVR recording seems to have broken at some point. I remember testing it way back months ago and it worked as it should but now a few firmware releases later when I tried it...