As you may or may not know, Until Dawn was originally slated to be a PS3 title. The video covers why it ended up on the PS4 in greater detail, and it shows a distinctly different game than what was ultimately released on the PS4. This is a demo version of the PS3 game that is likely an alpha build, maybe very early beta at the latest, which means textures are rough, the framerate is inconsistent, and various technical issues are obvious. It shows a game more built around interaction and potential puzzle solving than the interactive choice impacted story that ultimately made up the final release. Characters are different, and overall it looks like it would be a very interesting game to see the light of day for something like VR with the first person perspective and Move support.
Check out the video if you want a look at a very early version of what would eventually become the PS4's most prominent horror title.
https://www.youtube.com/watch?v=ppmjf8rAOyg
