AirVPN has a number of Linux options running through openVPN or wireguard https://airvpn.org/linux/

Firefox and ublock on desktop. Revanced on android.

Thanks for following up! I’m surprised it just dumped out one mkv file without you having to command a specific chapter to decrypt. It’s good to know that you can probably set up a batch file to decrypt everything in a whole directory!

I’m glad I could help! Can you post the CLI command syntax that worked for you to run makemkv to decrypt your ISO? It will help others are trying to figure this out in the future. Or was it just the single makemkvcon command you posted?

Here are makemkvcon syntax parameters for you to try: https://bluray.beandog.org/makemkv/man/makemkvcon.html

I believe they do. Their Linux installer link is buried in the forums: https://forum.makemkv.com/forum/viewtopic.php?f=3&t=224

They have batch ISO convert CLI for Windows: https://forum.makemkv.com/forum/viewtopic.php?f=10&t=15426

You may need to network share your headless seedbox or whatever you have the ISO on to do this off a linux or Windows machine.

If it’s a 29GB ISO it’s definitely not a DVD but likely a BluRay. It may be encrypted/corrupted/not a video. Try MakeMKV next to see if it can decrypt and recognize the chapters.

Handbrake reads and converts DVD movie and video ISOs. If they are encrypted, MakMKV and DVDDecrypter can be used to get them ready for Handbrake.

My library also supports LibriVox and Hoopla. They also have two isles of CD audiobooks and you can sign up to borrow others from the library in the area. They may not have everything, but have a pretty decent enough selection to keep me entertained for the most part.