You want to record your live event and put it on demand or use it for other purposes. This is also easily possible in SlideSync.
To record your event, you have to activate the recording in the Settings of your event.
In the Settings, scroll down to the item Record and activate it. (Recording is usually activated automatically).
You can also activate the item Auto publish recordings. This will make your recording available on demand via your public link after the live event has finished.
However, you can also continue to edit and manually publish the recording on SlideSync after the live event ends, if needed.
For detailed instructions on how to edit your recording, see this article.