How do I avoid having recording sessions that contain no activity?

When you configure a session recording, you can choose whether a session should be recorded only if there has been at least a click and a scroll. This is enabled by default so you don’t end up having recordings with no actions.

If you also want to replay recordings with only a click, only a scroll, or no activities, you can disable this setting in Matomo (Piwik) > Session Recordings > Manage.