EDIT: try copying and pasting this link, direct to the video (hopefully) was still active monday night (tuesday morning)
NFL Rewind has the game online Free, go to bengals page on the nfl website, On the top of the page there is a Banner Ad that should advertise the game on rewind. Its free if you're in the blackout area. Usually they have these on for a couple days so don't wait if you want to watch the game.
(are links allowed?) http://www.nfl.com/teams/cincinnatibengals/profile?team=CIN
banner should be at the top