Thanks, couldn't be any clearer5GHz has a much higher bandwidth, meaning it can transfer data much faster than 2.4GHz.
Higher frequencies have shorter range than lower ones, so you won't be able to be as far away from the camera when accessing it but it's still plenty enough range.
The 5GHz band has less devices operating on it, so you'll have less interference than 2.4GHz.
The only reason to not use 5GHz is if your phone doesn't support it.