I'm with Philip, there has to be a better explanation as to why the aircraft swung to the side like that.
If the wind really was that strong, those guys would be really struggling to walk straight, and not to mention, those orange cones (whitches hats) around the visible engine surely would have blown over. It can't be that 'easy' for the wind to shuffle an aircraft of the size of a 737. If a 737 can be moved like this, then what chance would the lighter prop planes have ?