What's the name of that movie?

I don't know what's the name of the movie but i'll try to explain its story. group of people who practicing magic went into a jungle where another group has been killed in.they camped one night in the jungle and when they woke up they didn't remember what happened that night. And the story goes on until they found the tape of that night and they founded that they see what's not going on. for example one of them killed the man in the shop but she didn't know that util she saw the tape of the shop. help me to find the name of that movie please.