I've been using Listenbox for a bit now, and its been great to bring YouTube-only content into my preferred podcast client (Overcast) to enable dead-noise reduction and voice boost.
I saw the last time it was posted here was 2019, and I've since seen discussion on how folks would appreciate a service like this.
creator here, thanks for posting. The backend is pretty solid at this point, and I'm slowly adding new features (for example https://brighteon.com channels are supported now). Another big one is a new UI for both Listeners and Creators. It'll take me some months/years though