First of all: DO NOT LINK, AND DO NOT SEARCH FOR IT
It was a dashcam video, that didnt really show any gore, you could just see something (a brick?) flying through the windshield and hitting the person (the drivers wife?) in the passenger seat. I had seen gore videos before, but this one traumatised me forever. The gut wrenching drivers scream fucked me up and made me feel physically sick, I immediately knew it was 100% real. You could be the greatest actor of all time, but you’d never be able to copy that and I never watched these types of videos again.
A French horror youtuber (Feldup) talked about it, saying the same thing as you (do not search for it, do not watch it).
But from his description what I understood is:
Tap for spoiler
The passenger was the wife, the driver the dad and behind them were the kids that you can hear crying and dad telling them not to watch.
Anyway, don’t watch it. I stopped scrolling on /b the day I saw a woman getting killed. Looking for this kind of stuff is bad and makes people feel nothing when confronted with human misery and horror, that’s not a skill you want in life.