Review on RunCam Hybrid 4K FPV and HD Recording Camera - Dual Lens FOV 145° Single Board, QR Code Settings - 18g Low Latency Micro FPV Camera for FPV Drone and RC Hobbies by Andrew Arneson

Update! I can't recommend it after a year of use. Everything below applies, but the quality is absolutely terrible. After I bought 3 of these, 2 failed due to problems with the circuit board. One was replaced, the second was offered to buy a capacitor and solder it back to the board. Very cool concept but with bugs. Basically gopro and fpv in one. Not all the bells and whistles of a GoPro, but much lighter and more compact. The FPV camera works well. The downside in a serious accident is that you lose both cameras. It has holes for mounting the board of size 20x20. So be aware if space is limited. Quality control and customer service are non-existent.