Creating a Replay-able Game

Have anyone attemped to create a replay-able game in Panda, where it has a ‘Replay’ mode that loads a log file and recreate the rendering of the game? I’m really lost on how to start. I searched in the panda forums and the only topics I found are on savefiles. There’s a topic about this in GamaSutra
I can hardly grasp the concept without a real example, so any example would be a super help!

Take a look at this:
I think this game had a replay mode implemented. I dont know if it is what you are looking for