The common wisdom says it's a matter of altering keyframes. But it's tough to tell because we don't see any animating properties.
See if there are any appropriately-keyframed properties -- like Position -- and report back.
I am not sure I've been looking at video and yes they all say there should be keyframes. But I am not seeing any keyframes and camera still moves.
Is there another place where keyframes could be?
I can't access Google Drive from the network where I work, but templates usually have things nested in precomps and that's likely to be where the keyframes are hidden.
Did you ever locate the keyframes in your comp? Where were they? Let us know.