Hello there, the one from video is the upcoming update for LS:Nightmares, it's been in development for few months now and it's a huge overhaul and improvement of the entire game, it's aimed to take LS:N closer to the original (2D Leaden Sky) and improve upon all the existing mechanics, the animations, gunplay, visuals, sounds etc. and the storytelling.
It's not out yet, but it will be either this month or next one, can't say for sure but I'm working hard on it.
If you bought LS:Nightmares you will be able to play it no problem once it's out.