The video depicts a person whose face has been partially eaten by Necrotizing Fasciitis, also known as Flesh Eating Disease. Part of the left cheek, and for the most part both lips, appear to have been eaten away.
Whereas Necrotizing Fasciitis is a bacterial infection, administration of proper antibiotics may help to stop the spread of the disease, and/or eliminate it all together.
I don’t know where exactly the video is from, and couldn’t reliably pinpoint the language from the chatter. Those Chinese signs in the corner don’t necessarily mean it’s from China. Either way, the person likely lives in an impoverished area with limited, or non existent access to health care facilities, which is likely why the disease was allowed to get this far.
Props to Best Gore member @african-angel for the video: