Wow..what a great video, well shot and so much more interesting when head cam show a rider in front. To those who say they dont have that level of ability, Im sure you could manage it, Ive only just got seriously into DH biking after I visited Morzine (my brother runs a chalet business) and I took the plunge and tried some of the Morzine/Let Gets runs and survived !..at the time (and even now) my ability wasnt that great and neither was my bike, but still had a great time and managed to do most of the runs, except the real extreme stuff.
The Gotschna run doesn't look too extreme, hardest bit would be making sure you dont fall off the side of the Northshore bits !, there looks like 1 or 2 steep drops I'd avoid but there prob is alternative/chicken runs around them
Andy