To me the most important quote was as a reaction to the interviewer stating that she is the only one in the palace who has known a free life. Her reaction was simply i don't think in limitations i think in opportunities.
There were short clips of moments in her life as a Royal. Of course the tear during the wedding was part if it. She explained that most of her Argentinian friends and family were tearing up or crying as it was a difficult time for the country and the song was that emotional.
Another clip was her short statement when she returned to work after the suicide of her sister Ines. It still brought her to tears.
When asked if princess Alexia is going Atlantic college had similar motives as her father the queen laughed and denied. The king as a young man had explained his going to Wales with the words that he did not think he was difficult and his parents did not think they were difficult, the three of them did not agree about the other party.
Alexia is going out of curiosity and wanting to meet new people in new places.
She was happy that the last year she travelled less and that meant spending more time with her daughters, especially as the two oldest ones are leaving home.