Fine, penalty, or yellow and penalty try?

Incident timestamp 7:44 Sacha does a flat cross field kick...Kolbe runs down the wing and taps on with his foot but never collects the ball...yet a tackle is made on him and it slows him possibly preventing him from scoring a try. I don't know the answer, but as far as I do know, you can't tackle someone unless they have at least some sort of control of the ball. Thoughts?