That's some serious skill. Not only is the plane landing in the mountains, it's also in the middle of the forest. Not only is it in the middle of the forest but the runway is incredibly narrow. Not only is the runway narrow but it's a bumpy arse strip of dirt too. So yeah. That is some serious skill.
Hell, I couldn't even see where the runway was for a good chunk of the video. According to the video description, the plane landed on Simonds strip in the Idaho Backcountry at 5243' elevation.