Replying to Who has the right away?

Who was wrong in this video? I think the more experienced guy was at fault because he tried to pass in a narrow area. But in all seriousness, that wide beginner carve across the entire run shit is annoying.
I had a similar experience but on a much wider slope. Trying to get to the park at my local mountain and I made sure to avoid a new skier. The last I saw the skier, they were at least 50 feet away from me. The next time I saw the skier, they cut right across me and I took a massive tumble ending up with a concussion. If I'm going straight and the path in front of me is clear is it my fault if someone cuts across the entire slope and manages to get right in front of me? Does person who cut me off have the right away since they technically got in front of me at the last moment?