In this guide, you will be able to get the KEYCARD & CAMCORDER in The Forest. You have to follow the guide, and you will be able to get both of them.
To get a Keycard and Camcorder, you will need explosives and some molotovs. Come up to the cave below using a map and compass. You have to climb through the cave and then instantly go left to get into the cave.
You have to continue to go into the cave. While going, you will find a yellow rope on your way. You have to go in the left direction while ignoring it and keep going straight.
You will find a skull through your way. It means you are going in the right direction.
Just go straight in that way, and you will find a rope ahead. There will be three CANNIBALS underneath. When you see them through the edge, they will come over to kill you. So you will need explosives and molotovs to kill them.
Now come down when you are done and then break the wooden obstacle.
Now going straight will lead you to another rope. You have to stay alert, and kill them using the explosives and molotovs. Try not to descend there without killing them.
Once you have done this, come down and pick up the Camcorder, which is on the left side at the end of the room.
Now, you have to look back by standing there, and you will find the Keycard. Get out of the cave now.