This option is only available on On-Premise / Private Cloud deployments.
You can setup the monitoring settings for Screen recordings so that the video records will be deleted after certain days:
Click the Gear
icon near the top-right corner of the dashboard.
Select Monitoring settings.
Select a monitoring profile.
Click the small Gear
icon at the right side of the SCREEN object.
Enter the number of days you want to keep the recording for in the DELETE HISTORY AFTER (DAYS) field.