A rapper who wanted to promote their video created a fake C&D and corresponding warning video, uploaded the video to Youtube, parked his car on the highway, and played the video on the screen all as a "prank" to promote said video. You could do that all in an afternoon. That doesn't seem that unbelievable, especially considering half the runtime of the linked video is an ad for his music. I mean the guy is already at a buying a Cybertruck and rapping about it level of needing attention. Is stretching the truth for promotion really that big of a step from there?