Very nice video. FWIW, the trident maple on the rock at around 4:19, is a tree given to the museum by Stanley Chin. It isn't a windswept style (although bonsai, like suiseki is up to the viewer's perspective.)
It was grown to resemble a dragon, the neck and tail are the extension. The critter's legs are gripping the rock. Chin was local to the D.C. area, I think.