https://www.youtube.com/watch?v=bJE6-HwKJt0

The plugin can be downloaded from our official Downloads directory or from Joomla Extensions Directory and installs as any other regular Joomla plugin. After installation you can find it among "system" plugins as System - YouTube Importer

This plugin periodically checks for the availability of new videos in the YouTube channels configured, and imports them as new content items in the associated categories according to your settings. The plugin action is triggered by front-end user activity. More visitors you have, more precise the timing is.

https://www.youtube.com/watch?v=gR-C5LP-FiI