Free and Open Source Software

I've recently decided I don't want to browse youtube via the whole 'recommended' frontpage anymore, I want to switch to a purely subscription-based feed. This means I'll need to use a third party frontend/client, as the official sub box is algorithmic.

However, I've always been interested in peertube and love to try to use it whenever I can, but unfortunately, the content just isn't there yet to use it exclusively. There already exists clients that let you use either service, but that's not quite what I'm after.

What I'm looking for is a client with a sub feed that takes from both services. I can subscribe to a channel on youtube, and another on peertube, and my sub feed will display both together. Does such a thing exist?