Supply time is abnormally short
Currently I don't have access to the video, so I'm just gonna say something out of context.
If the player is sitting around an ammo box or bag for long enough, they will be resupplied. And if they didn't move out of the resupply radius, the resupply time limit for grenades won't be reset. In other words, they don't have to wait for another minute or so, just to get resupplied again. And multiple ammo boxes/bags will make the resupply time shorten even more.
Hope this can help.
It seems that the situation Rio described applies to the video.
Closing thread to prevent spam.