So earlier today a Reddit user posted a video of early Black ops 3 zombies gameplay but was taken down. Luckily another person on YouTube saved both videos and re uploaded them on to other websites. This gameplay is 100% legitimate even though it is in the worst quality ever. EDIT: Video 1 was taken down Enjoy: Video 2
It's literally like 10 seconds long.. could easily be a custom map on PC or something.. idk (Video 2) For Video 1... I think is legit for sure.. and looks really cool.