Do you want 2 intros to run one after another (consecutive)?
If so in your intro code at the end of the first intro, you would do a changestate to the 2nd intro (instead of changestate into stance animation). At the end of the 2nd intro you would still use a changestate to the stance to end the intro.
If it isn't that, please explain what you are asking. The video does not (in my eyes) show 2 separate intros running at the same time, and unfortunately does not explain what you want or need. Please try explaining it?