I don't know what is more interesting - the brooches or Princess Anne's responses.
1. The Maple Leaf brooch
The Queen Mother was given one in 1954 for Princess Anne. She was also given one for the Queen (QEII) during the 1939 Canadian tour.
Brooch given to QEQM for Princess Anne.
Princess Anne has worn it several times. In the photos from 2014 I think she is wearing the same outfit.
From the video