You'll need to contact the person responsible for that package. This bug tracker is for the packages which are part of the main Ubuntu repositories (which I believe do enable dvdread).
Incidentally, if it does turn out that dvdread works and dvdnav (the usual dvd reading library) does not, it'll be good if you report a bug about that to dvdnav.
> *** 2:0.29. 1+git11~ bionic 500 http:// ppa.launchpad. net/mc3man/ mpv-tests/ ubuntu bionic/main amd64 Packages
You'll need to contact the person responsible for that package. This bug tracker is for the packages which are part of the main Ubuntu repositories (which I believe do enable dvdread).
Incidentally, if it does turn out that dvdread works and dvdnav (the usual dvd reading library) does not, it'll be good if you report a bug about that to dvdnav.