If I had to choose one - it would be the one Franck identified - what I know as the Gold Trellis Leaf Brooch.

I say this because, when I was looking at the brooch in the video, it seemed to have the shape of a North American Indian headdress with all of the feathers pointing the the left in the same why that all the elements of this brooch point.

Also 992234177 - this is the brooch that I have noted as the wedding gift to HM by the Directors of Garrard's