PBE players are the first that will be able to fool around with the new replay system as according to Riot's Status Kwoh, it will require its fair share of testing.
The feature works in a simple way. First, all games within certain time frame (currently seven days) are recorded on Riot's servers and players can access those databases to watch a particular replay. Once that replay has been viewed, it can be saved on player's own hard drive, from where it can now be sent to anybody else that might have interest in it.
