Check out https://ghcr.io/nichobi/sponsorblockcast - run it on your LAN, and it’ll use SponsorBlock to clean up any YouTube-Chromecast stream you want.
And of course the thing I mentioned has now been superseded by https://github.com/gabe565/CastSponsorSkip
Check out https://ghcr.io/nichobi/sponsorblockcast - run it on your LAN, and it’ll use SponsorBlock to clean up any YouTube-Chromecast stream you want.