This video is taken during a dinner with the crew of the serie The new adventures of Chor Lau-heung, probably to celebrating the last day of shooting. At the end of this video there is a small part in which Barbara is acting in plain clothes.
The acting at the end is just to give the viewers what is going to happen next in the Drama "The New Adventures of Chor Lau Heung".
What Barbara(albeit in modern clothing) said is she is going to meet up with two other main characters(who are plotting a murder) in the Drama and the guy hustling her should not try to stop her. Her last sentence is "You can't stop me as I'm a princess". Barbara plays her role as a princess in the drama.
(thanks to Eblc2006 for explaining this video to me)