Newpipe has completely replaced my Youtube usage since I mostly use it on mobile, and it lets you save your subscriptions locally. Its actually really nice and imo superior to the dumbed down Youtube app used nowadays anyway. Freetube is the same idea but for desktop, but I've found it to be much buggier in using it, so I occasionally just use youtube in a private tab and directly search for a video on desktop, usually after seeing in my Newpipe feed. Both of these are listed in the original list, but they deserve special shoutouts since YouTube is the site with the most universality within Google's ecosystem. Also many of your favorite video creators may already use services like LBRY and Bitchute.