[Adam]

Video 3. Ref just missed it. It happens.

Video 4. I see what the ref saw. First defender is not likely getting a foul called.

Video 5. First defender: I see a lot of ball, hardly any contact between players. The contact that starts to trip the ball handler is made on the feet, after the defender has gained his position. That's rarely a foul on a defender. Second defender, there's some contact, but it looks like it was simply missed. There's not a lot of affect on your player with this second defender (although at that level, it's something I'd call if I see it), so th official may have passed since your player kept the ball.