Package: cdimage.debian.org Severity: minor User gets as far as https://cdimage.debian.org/cdimage/weekly-builds/ whereupon entering https://cdimage.debian.org/cdimage/weekly-builds/amd64/ he sees a "bd" not explained where CD and DVD were earlier.
He must check https://www.google.com/search?q=cd+dvd+bd to finally guess what "bd" means.