sh404SEF getting started video
sh404SEF is a Joomla-3 only extension. It will be/has been discontinued on August 17, 2023.
You can switch from sh404SEF to 4SEF for SEF URLS and 4SEO for an all-in-one Joomla SEO extension, which both run on Joomla 3 and Joomla 4.
Please refer to the sh404SEF FAQ page for more details.
Please note this video has be created with an earlier version of sh404SEF. Though the visual aspect is not exactly the same, the information provided is valid to this day.