YouTube channels have RSS feeds. And in my RSS reader, Miniflux, they play back without ads.
So I wrote a ropey Python script to sync my YouTube subscriptions into a Miniflux category... https://code.s-n.me/stephen/youtube2miniflux
It's a bit of a rough user experience, but if you're self-hosting your RSS reader, then you can probably handle it. If I can summon the energy, I might make it nicer in time.
It's low effort on my part, but no fucking LLMs were involved in my part of it's creation.