Door (Concept Teaser) is an article in Resident Evil Recollections. It was uploaded on 30 January 2015.
One of the easter eggs in the Resident Evil Revelations 2 concept teaser trailer is the Door.
> Resident Evil Revelations 2 Concept Teaser
Doors were strategically placed in the classic Resident Evils not so much for effect, but as a sneaky way to hide the loading times, although the pause they introduced became part of the entire experience.
One of the extras for purchasing the Resident Evil remaster was a demo video consisting entirely of the game's doors, you can see a digest of the demo at the following link:
＞ Resident Evil - The Doors
Got to love those doors!