Twitch streams disappear after a while, and the recordings Twitch keeps on your behalf aren't always in the shape you want. This is a desktop app that gives you a quiet place to manage them. Grab past broadcasts from your channel, compress them down to a reasonable size, and store them on your own terms, either in cloud storage you control or as uploads on YouTube.
Everything happens in one window on your computer, so your archive isn't scattered across browser tabs and command line tools. You pick what to keep, the app handles the downloading and converting, and you end up with an organized library instead of a pile of files.
It's for streamers who care about their past work. Maybe that's preserving highlights, maybe it's making content easier to find later, or maybe it's just not wanting to trust a platform to hold your memories forever.