Person who shot the video says:
"I was driving on I-376 East near the Pittsburgh International Airport and saw that an accident must have just occurred. In the distance, I saw other cars pulling over, and then people rushing out of those pulled-over cars and running across the interstate. They all banded together and started pushing on a car, and I realized there must have been someone trapped underneath. I called 911 and got an "all lines busy" recording. The group of people who had gotten out of their vehicles managed to lift the vehicle, while at least one person pulled the woman out by her legs. It was a sight I will not soon forget. I do not know the condition of the woman. I checked local news sources the rest of the day and the next day and never found any information. I hope all of the passengers, including the trapped woman, are okay."