Digital Audio Workstation (DAW) for people who want to record, edit, mix and master audio and MIDI projects. When you need complete control over your tools, when the limitations of other designs get in the way, when you plan to spend hours or days working on a session, Ardour is there to make things work the way you want them to.
That’s basically what the dude says in his videos. Such an unfortunate thing to see, honestly. I wish I could make such software.