Some low res video of my Nighthawk 250 with BrainFPV. Running on a 2250mA 3S battery, so it is a bit heavy and piggish.
I have a second BrainFPV on a 450 setup for AP, but it has been down for over month with sensor errors as soon as it lifts off. I have replaced the 5v BEC twice now. Added a choke on the 433Mhz rx, completely removed the 12V BEC, disconnected the ESC ground wires, swapped out a suspicious motor and ESC, and it still throws sensor errors on lift off. I have little hope of ever getting it back in the air, and can't afford another FC at the moment.