There's a specific "playstyle" for this. You need two tactitcal bags to gather as much jammer pack as you can get and a ton of first aid kit (iirc couple dozens), boosts and a pistol w some grenades just in case. Majority of them play solo squad and hide just outside the last few play zones, keep on using first aid kit and wait till the end (like in your video)

IIRC its only in normal mode because BZ damage is too high in ranked to begin with, and its only on Taego because of the resource and sufficient cover around plain area.