No addon. In this particular video i used only variation of:
camera = "camera" camcreate [0,0,0];
camera cameraeffect ["internal", "back"];
camera attachTo [object_1, [3, 3, 3]];
camera setDir 0;
camera camsettarget object_2;
camera camPrepareFOV 0.3;
camera camCommit 0;
Replace the values as you need, with a little bit of practice you'll get the hang of it.
I also use when i need it: this exec "camera.sqs";
