Hybrid is a Windows only Qt-based frontend for a bunch of other tools which can convert most input formats to common audio & video formats and containers, see feature list for details.
Hybrid is intended for advanced users.
It's not intended to be a tool used by everyone. It's not intended to please amateurs who need a wizard-like interface..
If you don't know the basics about containers, video formats, etc. Hybrid is not meant for you.