Hmm, actually researching this more, I don't think it's actually legal for a regular individual or corporation to make a copy of a DVD movie for backup purposes. I don't think it actually falls under fair use.

You can backup software[1][2] (allowed by law, not fair use) but not movies.

[1] https://www.southerncaliforniapatents.com/articles/2014/10/0...

[2] https://www.law.cornell.edu/uscode/text/17/117