You may not have known, but you can actually watch and edit videos of your past games. All of them. Edit (thanks @iPlayGoodGames): It seems that you can only view up to your last 50 games. It is unknown if there is a certain time period until a replay gets deleted. Here's how you do it: First go to the replay tab, then select Post a Play. Next, select one of your replays and select Begin Editing. From here, you can skip to any time frame in the video, watch in slow time, turn on and off hud, etc. Hope this helped!