A fat bird on a rope swing. This was always going to end badly.
Apparently she broke her thighs, knees and arm according to her friend who commented on the video. She was also upset with the youtuber for uploading it and making it viral.
Those injuries don't surprise me at all. Bloody stupid thing for her to do though; what possessed her to think that she had the grip strength to hold the force created by 300 lbs jumping onto a rope swing?