If this is the one at SF Jct in KC, (cannot view videos at work), then, yeah. Scary! That railfan got some primo footage!
Was a bit concerned, since it happened in the middle of a bridge! Locomotives leaning and cars starting to accordion! Bet that was a fun clean up!
There is already a thread on this https://www.trainboard.com/highball/index.php?threads/derailment-caught-on-virtual-railfan.133713/
Wow... or rather, Yikes... I'm surprised the train didn't fall off. Best is, there doesn't seem to be anyone hurt. I guess the guys in the cab need some fresh pants...