While inquiring about import tariffs for tripods (3.7%) I was talking to the adviser about digital cameras that make movies and he told me of this change.
Up to now digital stills cameras (under which tariff many of us have imported our Red Ones) is zero duty, but now the rule is based on the resolution, speed and data capacity of the camera.
If it is greater than 800x600, 23fps and 30 mins it now comes under video which is 8525 80 91 00 at 4.9% but that is as long as it has no auxiliary inputs for audio or video that means it can record (or mix) sources other than from the camera itself or its own mics. i.e. like some camcorders. In this case it will be 12.5%.
I don't think any flavour of Scarlet is going to avoid duty from now on.