What's the done thing?
I haven't needed to do this in years, but now I find myself in possession of a couple of commercial, protected, region 1 NTSC DVDs. Handbrake 1.3.3 takes forever to read the indexes and then writes MP4 files with glitchy audio and no video at all. I've installed libdvdcss 1.4.2 into /opt/local/lib and /usr/local/lib, but I don't know whether Handbrake actually sees that. Since this is macOS 10.14.6, /usr/lib is unwritable.