This clip is currently being hosted on the site of a now-former 3D Realms employee (though it can no longer be accessed publicly). It’s full of, supposedly, Duke Nukem Forever gameplay footage.
https://kotaku.com/is-duke-nukem-developer-3d-realms-gone-for-good-updat-5243277
You’ll see many of the same enemies from that concept art that surfaced the other day, so it certainly looks legit. It also has boobs, so don’t watch it at work.
https://kotaku.com/duke-nukem-forever-screen-shots-artwork-rise-from-3d-r-5245883
