So 14.11 states -
- The tackle ends when:
- A ruck is formed.
- A player on their feet from either team gains possession of the ball and moves away or passes or kicks the ball.
- The ball leaves the tackle area.
- The ball is unplayable. If there is doubt about which player did not conform to law, the referee orders a scrum. The throw is taken by the team moving forward prior to the stoppage or, if no team was moving forward, by the attacking team.
Since none of these criteria have been met. Then I'd conclude that the tackle was still in progress. S0 WB was a 2nd tackler. I also don't think he dived on the Ball Carrier. He tackled him, from the side. No where does it state that a tackler needs to remain on his feet during a tackle. For me, this was a perfectly legitimate attempt at a tackle, which had the desired outcome, no try scored.
I think that the crus of this is when is the tackle completed? If it as soon as the BC is brought to the ground, then we'd need to ref that as such and rule out any tries that are scored after a tackle is "completed" (when the Law 14.1/2/3 conditions for the tackle are completed. Or the tackle isn't completed till the BC is stationary, which is how we ref it.
The other video that "should've" been penalised, again shouldn't be. If you penalise that one, then you need to have the requirement of the player regaining his feet before the try can be scored in this scenario. As he's been tackled (a tap tackle is still a tackle). Which would be a poor requirement to have. If either the player in the 2nd video that wasn't penalised or BW had tackled in a dangerous manner - shoulder/no arms or slid feet 1st, then fine that's a different issue. That is not what happened here though.