Originally Posted by Garp
Every LED I've seen does that when filmed, it's not perceptible to the human eye when viewed directly. It's a side effect of a rapidly flashing light source and the frequency of the camera taking each still frame. Kind of like filming a TV gives you visual interference.
This seems to be distinctly different than what the OP is seeing, which sounds more like an intermittent ground or similar
Yup, Audi / MB LED running lights do this in videos as well.. Sounds different than the OP's brake light issue.