videos is up in my share... I think it has to do with a marine that kills enough cabinets.
As for the doors I dont think its them... i should change the topic title now...
If there is indeed a tribute room here, I know how to beat the covenant in the fight for the beach.
The following was on legendary.
I killed the covenant on the beach before I could see the building. Once I got close to the place where you can fight the covenant forever, I rushed the wraith that gets dropped down and jacked it. I had to hit the wing things off, and its hard to get up the hill, but I made it up the hill thats meant to be a flanking path. From there, I could kill all the covenant, no problem. Single player, I got far, with no damage at all, using the wraith to kill everything. Then I had to go, so I couldn't experiment. I do have the game saved, so I shall continue later. So if you need to defend the beach, use the wraith. You are unstoppable. With four players, and one in the turret, you cannot die.