http://audiobookbay.nl/
https://librivox.org/
https://forum.mobilism.org/viewforum.php?f=124
https://github.com/dessalines/essays/blob/master/audiobooks.md
https://www.youtube.com/channel/UCaO1QA8QL99_eb0XhJI2Fyw/videos
https://www.youtube.com/channel/UC3ClSqbN5tlXOuFj3eqyAoA/videos
https://www.youtube.com/channel/UCLuOU7ExpyrupHu35sIqgnQ
You can rip the youtube videos with something like Youtube DLG. There are also private torrent trackers like myanonamouse and bibliotik.
Not sure, but I never got flagged by my ISP when I used it without a VPN a few years ago.
i mean if you like listening to audiobooks with a plug in that's up to you man, personally i would find it distracting
Yo, get Libby folks. It lets you use your library card (and you can get a library card online these days due to COVID) to download audiobooks and ebooks.
Also recommend Kanopy which is the same thing but for movie and tv streaming, and they have a great selection (though it’s not v. Well organized)