Mmm. I did exactly the same, wiresharked the local RTSP adress from very fishy windows program and used on ONVIF app on TV. For my birdbox.
But there are few problems with it:
- HDVIDCAM android app requires unnecessary permisions (location and microphone), some report actually (on google play) that antivirus software flags it as malware actually.
- I got shock that I could watch stream from work on adroid, despite strict firewall and no uPnP on router
- so I whipped a wireshark WiFi access point to see what give. It communicates all trafic from very varying AliBaba owned proxies in germany. still a standard RTSP stream with long token.
- in cam defence, there is almost zero activity when android app i down, that also means that local stream only starts when prodded by cloud
In the end this is not a device anybody should ever have on their LAN (especially running with server/NAS), nor the android app should be something on your phone.
I run it on isolated network with other smart devices, and view it from a dummy 2ndary mobile phone, so there is no local RTSP acess anymore
Windows program really should be only run on a VM.
Setting an acess point with selective VLAN capabilities to let only local rtsp through is beyond my level, and makes it probably 10x expensive in hardware.
Dont buy this crap until custom firmware is available. So far couldn't find any reference.