Video length: 1 min 14 sec video of an environment that is oxygen deficient. This is just a C02 Gas Suppression test and commissioning at Print Works.
NIOSH article which talks about hazards and exposure. Article covers oxygen-deficient atmosphere, exposure limits, and immediately dangerous to life or health and eye irritation.
2-page PDF document. Air product document on effects of oxygen-deficient atmospheres. Also has a table of oxygen concentration and its effects.
Video length: 2 mins 43 secs. A video which explains different levels of oxygen concentration and its effects. Also includes a video of workers who are being resuscitated by firefighters after being unconscious.
An article which talks about oxygen deficiency, confined spaces and government regulations to address it.
Video length: 2 min 27 sec video. An example of an oxygen-deficient atmosphere. "This is an accidental system dump, no one aborted! Tanks are below the time marker."