The Cursed Immortality Elixir in the Woods

this was seen like a movie. I'm not even sure if "joe" was in it, or if I was just an actor or something but it was about a guy and girl exploring deeper into the woods and constantly finding new and exciting things but coming at a cost. Eventually found an old bed frame and a deeper darker woods and then an ancient village but then it kind of transformed to a school and thru these double doors that were very accessible but no one ever went thru, was this bed and further on was like an elixir for immortality or something. Or just pure joy. But everyone that went thru wanted to be the one who got it so everyone started secretly killing each other so they could be the one who got it. My character finds a rope and strangles the girl who goes before him so it can be his. And then goes on deeper. The movie sort of ended with 2 people getting to the end and getting the prize and then dying together in that bed and then it fast forwards to another lifetime when new curious kids stumble into that room and start looking and poking around. One kid sees something across the way and really wants to go and he starts poking the bed and mumbles "what's over there\...?" and underneath are the two dead bodies but they're not dead at all and the dead female grabs his leg and says "nothing good is there, nothing!!" Woke up.