Just use a Invidious instance. Don't even bother with YouTube. You can use an RSS feed reader to port your subscriptions, then use a redirection extension to bring you to the invidious version of the channel.
If you're so inclined, you can download the video using yt-dlp which you can use to download videos from invidious and even pass a sponsor block flag which integrates with the sponsor block api.
On mobile, if you have Android, you can use Tubular. You can request from Google to give you your subscriptions as a fifle that you can upload to these apps. Tubular also uses Sponsor block as well.
Lastly, if you're on iOS, the best I've found is simply to use the Brave browser.