Uh huh, baler twine is supporting most of the skyways, the other side is anchored to the wall.
There's three levels to climb to get to the top, total elevation is about six feet. The 1st level from the floor is about 12 degrees, 19 foot length to rise about 44 inches. The other two aren't quite as steep. I was in the basement when the trks were going in & out in that video. I don't trust my driving that much!