I think you made the right move getting a separate radio. I can't imagine the quality of the one that comes with the BNF is that good. You can definitely dial in the expo the way you have done on the Blade 350 (???) - and other settings that are really down to preference.
The telemetry modules will not transmit video. That is a whole different ball of wax. Do some searching for video transmitters & receivers - often found in the FPV sections. You will need a host of things to get video coming back to the ground, including: VTX, TRX, antennas, camera, goggles or monitor etc...