People are doing it all the time now....they have brackets that mount to your windshield just for doing this. Youtube is FULL of driving Videos today. I love browsing through them every once in a while. This camera was obviously on a mounting bracket. Camera didn't move or anything during the whole shot. Could have been a police video too...who knows.
Anyhoos.......I saw a similar wreck just like this on clear sunny day a few years ago. An 18 wheeler crossed the median on I 44 outside of Rolla Missouri and obliterated a Chevy Tahoe with 2 Guys in it. Let's just say the aftermath was not pretty, not pretty at all.