The limited information accompanying the video says it took place in Idaho’s Frank Church River of No Return Wilderness, and that density altitude was an issue. As best as I can tell, this is the preliminary NTSB report, which doesn’t offer many details. Nevertheless, it’s a dramatic depiction of density altitude’s effects on an aircraft that does not appear to be lightly loaded.
I’d love to read a Never Again by the pilot in this accident. I’d also love to know what he thinks about the video posted by his passengers, who apparently all were videotaping the flight. At the time of this post, the video had 338,978 views.