I recommend to upgrade as 23.04 is not a LTS (Long Term Support) release and has only security updates until 20 January 2024 https://en.wikipedia.org/wiki/Ubuntu_version_history

They defend the right to repair as long as you buy everything from them and only them and at the crazy prices they always apply even to the dumbest things.

old trusty avidemux

Webmin is a web-based server management control panel for Unix-like systems. Webmin allows the user to configure operating system internals, such as users, disk quotas, services and configuration files, as well as modify and control open-source apps, such as BIND, Apache HTTP Server, PHP, and MySQL. https://en.wikipedia.org/wiki/Webmin