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.
A guy pulled over to take a picture of bird and noticed the bird dancing across the road in perfect rhythm to the song that was playing on his radio which was Daft Punk's 'Something About Us'.
It's not fake, you can find plenty of such videos on the Internet. This bird usually does that while hunting for worms.