I’m not sure what you mean by containers I’m afraid. NAS would literally be a player for local videos that I have (homes videos etc)/download.

(on reread I see it was gzdoom, oh well)

I see you've mentioned Zdoom, I"ve sank many hours into Brutal Doom (Extermination Day), Blade of Agony and Golden Doom. Found the Hakros Launcher recently which opened some doors (though not the most up to date, still a decent gateway).