That's not a brake check situation, the car driver made a full stop on the highway. It's in fact a 'crash for cash' scam that didn't work thanks to the dashcam.
If you have seen Pulp Fiction then you'll understand, if you haven't then I'm sorry for you..
The date on the video is wrong, this happened yesterday.
It was said that the police found the middle aged woman (you can see at the end of the video) and that she might get her license revoked for 3 to 5 years. She will also be fined around 1,500 dollars for fleeing the scene. The police also stated that they will not charge the guy with a dashcam for running a red light.
Just a Polish truck driver killing boredom by flashing his headlights to the song 'What Does the Fox Say'