It's west of sudbury if I remember right. It was once a trail. We went over it once. I've heard it's blocked off now. It saved us a bunch of miles on the last day of a trip as the trail reroute goes a long away around just to come back to the same spot on the other side of the trail. We were in a group of 3. I was 2nd. I didn't think much of it as I was following and it wasn't as bad as it seemed in that video. The guy in front saw the path on his garmin. When I got over it, I looked back and the 3rd guy in our group was sitting on the other end. He was having second thoughts about going over but he ended up doing it. I don't know what we would have done if he decided he couldn't do it - maybe meet up again later that day? I didn't want to go over it again.
Here's another look at it. I definitely only looked straight in front of me.