I will never understand why in clips like this they're constantly watching over their shoulders. Who even cares what you're doing in a secluded area, it's not like you're in the public. Then of course we have the fact that they upload this on the internet where *thousands* of people will watch it so yeah, makes no sense to me.
Next time just put the cam on the side, bend her over down on her hands on the ground and bang for a quickie? Try next? It's like Uttasana Yoga position. Excellent for outdoors and anywhere.