I only used an X Stand for a short time years ago. I screwed a piece of chain across the arms as a saftey net. As they say "Its not if your X stand will fail, its when"
Saw the same thing as the video happen to a guy in the NJ Toms River Elks club. Ever been there Donny ?
Felt so bad for him I helped him get his keyboard up on a table so he could keep playing.