Well I directed HSU to this thread, and their response was
"Looks to me like the particular movie cuts you played have lots of sub 15 Hz signal. I can see from your video that the cone is trying to pop out of the frame! There are some on one of the tracks on our test CD as well. The ULS boosts the lowest bass quite a bit so it tend to overload when playing tracks with ultra low bass. Adding a subsonic filter will help a lot for these few tracks."
So apparently its not the Oppo's fault, just the fact that the ULS can't handle certain scenes in certain movies with lots of sub 15hz bass?
I'm not sure what to do now, if I should just keep using it with the wireless transmitter, or sell it and buy another sub, or maybe keep it and add another sub, there is a second hand Paradigm Servo 15a for sale locally for $1077 NZ dollars, or $830 US dollars, but I think they're a pretty old sub now, and there is obviously no warranty with it, also its in another city so I can't listen to it, I don't know how it would compare to the ULS-15 either.
I made two more videos, the movie was the same as in the first video, X-men first class, and it was the same scene, the beach scene when magneto stops the missiles, one video is the ULS connected via rca, and the other is the ULS connected via the wireless transmitter, in both connections the sub volume on the Oppo was set to about 78db, and the Oppo's main volume was at 100, on my spl meter the max volume during the scene was the same for both connections, 89db, the videos were recorded at night so the lighting isn't the best.
The rca connection
And the wireless connection