Support candidates who want to limit the ability for large tech companies to acquire their competitors. Maybe even those that wish to see their acquisitions rolled back. Maybe even those that wish to see them broken up.
Grayjay has been useful for that. I still follow people on YouTube, but if they setup a channel anywhere else I can switch my feed to draw from those sources instead.
The source code for GrayJay is available if you're concerned or want to work on a non-mobile app/service yourself, but otherwise I don't know of anything that combines the services like that.
The alternatives are around now, and we know that many YouTube content creators are exploring other revenue streams, so it'll be interesting to see how exodus works. Clearly YouTube is going to continue to get worse and some people are going to leave. What's next? I'm excited.
It's always interesting to watch companies implode. Apparently Reddit is blocking non-Google search engines from indexing them, and Twitter wants you to be logged in to view people's profiles. Those types of moves guarantee that the platform won't be relevant a decade from now and possibly sooner than that.
Piped. It uses SponsorBlock to also skip ads by the creator in the video, I am very sure they will update it to remove ads injected by YouTube as well. It is also very privacy-friendly.