Any newbie should have confidence that making a D2O backup is easy and reliable. If anyone finds an issue at first, posting here would be a good first-step instead of producing lots of coasters and getting frustrated.
However, when asking for input, details are a requirement for anyone to give solid advice… For example, name the ripper used and it’s version (and the Mode used for rip), your current version for D2O and choice for Movie-only or Full, and Size setting. Also, the burning app version, and the settings used. In some cases, your burner, it’s firmware #, and the media type/brand/speed enter into ‘issues’.
Your OS, and your stand-alone player may be involved as well.
As ‘shot in the dark’ advice, use DVDDecryptor 126.96.36.199 and in FileMode. If Nero must be used, try UDF-mode.
What model is your player? DVD + or - R or RW?