Very helpful! Due to some injuries, I've been falling behind the rest of scrum halves in my team in terms of passing, I've been trying to work on it and this video is exactly what I needed to keep practising on my passing, tysm!
“Inside” in this case means “closest to the middle of the pitch.” Most passes go out towards the players running up the edges, and since you’re squaring your hips to them to pass the ball, your “inside” foot (closer to the center of the pitch) will be forward.