What is up with salt BAES mouth?

Several comments suggest the cause may be a stroke or brain injury, but Salt Bae seems to be doing it deliberately and with emphasis. You can see him talking out of the other corner of his mouth in various videos from the past.

Is Salt Bae an actual cook?

Nusret Gökçe (Turkish: [nusˈɾet ɟœcˈtʃe]; born 1983), nicknamed Salt Bae, is a Turkish butcher, chef, food entertainer and restaurateur whose technique for preparing and seasoning meat became an Internet meme in January 2017. He owns Nusr-Et, a chain of luxury steak houses.