Time remapping is the best way, but a quick and dirty way is to go to the time where you want to pause the video.
Make a still of that frame (Composition > Save Frame As).
Import the Still into AE and drop it into the timeline at that spot, below the video layer.
Split the video layer (Edit > Slit Layer).
Extend the Compsition 2 seconds (Composition > Comp Settings).
Slide the right side of the split layer 2 seconds to the right.
You can change the pause time just by sliding the right side of the split layer around.