Far from conclusive
Much as I want to, I can't see a foul there. I'm not saying that there wasn't one - just that I can't see it.
Speaking to the ref and the linesman after the game, they didn't see a foul either. The linesman felt that Ben had jerked his hands forward to avoid the ball going behind the line and that had resulted in the ball colliding with the Tonbridge 9.
I haven't seen anything on that video that explicitly contradicts that.