The video clearly shows the Scots "attempted tackler" lost contact with the Kings ball carriers foot as he falls to the ground 50cm from the try line. The Kings player was untouched so free to continue his forward momentum to score the try. He bounced forward. The mature referee was 2m away and correctly awarded the try. Law 14.3 states a success tackle requires the ball carrier to be held. You removed that bit from the insert above.View attachment 21858
Maybe you should check your rules. Once tackled, you cannot roll, crawl or bounce. I think the Kings player managed to do all 3 before going in for his meat pie....