Hello everyone, how true is this? (please see the video link below)

https://video.fmnl17-1.fna.fbcdn.net...=5CA2B5F5&dl=1

It says on the video that windows should be lowered so that the air inside the car (while it was switched off) will go outside. The air that was stored there especially during high temperature is cancer-causing (the mixing of burnt plastics and other chemicals). How true is this?

Video Link on Facebook: https://video.fmnl17-1.fna.fbcdn.net...=5CA2B5F5&dl=1