setup for recording full field sports unattended?
While not officially supported, it is not difficult to replace the lens in a GoPro knock-off. The lenses in these action cameras are using a M12 mount and can be replaced. So: you could try to replace the lens as a first step. Depending on what you are looking for in the video, details may become too small and two cameras would be a better option.


How To Replace GoPro Lens - DIY


I have done this myself with two cameras but replaced the lens with a lens that has a narrower focus. The lens costs less than 20 USD/EUR/GBP.


72 Degree 4.35mm 1/2.3 Inch Sensor 10MP M12 Lens