Elissa, you being a Principal PM at Microsoft, I expected some great (something unique) answers from you;, but after listening to this video I saw nothing different in your answer as compared to other PMs or Sr. PMs.
I believe interviews like these (interviewing standards questions)should be stopped, so that you speak more about what is the achievements or accomplishments you made in last 9 years, that made a difference in MS. You did mention that you chose this industry as you got a chance to maske/bring a difference, but how do we know what difference you brought to us. You answers to me sounded more fluff-talk.
I personally think its waste of your time in this interview, and waste our time too. Wish you could add more examples to your talk