Defective by Design has an Article about getting DRM-Free eBooks which I recommend checking there.
Sometimes, Humble Bundle will have eBook bundles which couple I brought are DRM-Free. Just make sure you check the details of the bundles as not sure if every eBook bundles would be like that.
It sucks older Kindle model are ending it support has I have one of them. I don’t use the email ePub to Kindle and instead used Calibre which I know there’s a fork of it that doesn’t have the vibe-coding but I forgot the name of it.
I disagree about using Odysee, it’s has far-right videos on there. Much prefer people to use PeerTube where the well-known instances at least won’t allow those sort of video in the first place.
You are talking about one of the most popular social media despite Elon Musk took over it.