By default, replay of the live stream will be available at the same link. If you would like the viewers to be able to only view the event when it's live and not the replay, please select the Live-Only option.
Tap your event and select Privacy Settings tab
In the Replay and Download section, turn ON the Live-Only option (no replay, no rewind).
The viewers won't be able to see the replay or won't be able to rewind the live stream during the event.