Ameen,
I've seen these firecam's and they won't do nearly what we want them to do for live wireless HD video.
First thing they advertise is the device as 4K but the resolution specs are 1080p up to 60 fps. It doesn't really do 4K.
The device has a WiFi video preview mode. This is low def video output geared to assist you with getting the camera to focus on the image you want. Ultimately this camera is made to record HD video locally to an SD card, not broadcast it wirelessly to an HD display. The included app merely assists the user with starting & stopping the recording among other things but won't stream real time HD video.
If you want a cheaper version, buy the RUNCAM 2 or the RUNCAM mini Split. It is an OEM style package which is much more adaptable for O Gauge use has all of the same features as this camera for just under a $100. These are pretty popular among the drone crowd, but again the FPV video preview is not HD. It does however record very nice video to an SD card mounted on the camera.
What a lot of this boils down to is that WiFi is not the answer for achieving wireless HD video to a HDTV. The protocols used in WiFi also have overhead and a lot of digital encapsulation of the information being sent needs to occur which causes more latency. WiFi in itself is many of the problems with stuttering images, signal loss, and a less than desirable HD experience.
High quality wireless HD Video is not achieved cheaply, the cheap products will shine though and eventually disappoint. Dumping WiFi for dedicated HD Transmitters and Receivers (preferably operating in the 5.8 GHz spectrum) is the first expensive step.
If you want real time video output with zero latency at an affordable price, you're pretty much stuck going analog with dedicated transmitters & receivers and living without HD. You can get some nice 700TVL drone FPV equipment that will get you close to 720p.
