Bluray is a type of disc on which data is stored. DVD is another type of disc on which data is stored. Bluray can store more data because it's information is written a lot closer together, and uses a much more precise laser to read it. A standard Bluray disc used for movies these days can hold up to 50GB of data, which is almost 5 times more then the largest commercial DVD. Copying a Bluray disc to a DVD will not result in 'Bluray on DVD' - it will still just be a DVD in the end. You cannot turn a standard DVD disc into a Bluray disc, or vice versa. It has to be on a Bluray disc to be called 'Bluray' - the difference is in the disc's structure, not what's on the disc.
If you mean you want to copy a movie off a Bluray disc and then write it onto a DVD, that would involve having to majorly compress the file because, as I said above, a DVD holds nowhere near as much as a standard Bluray. You won't end up with a 1080p film on the finished DVD, because a DVD cannot be read in the way a Bluray disc can (for example, up to 50MB of data can be played back from a Bluray disc every second - that is impossible on a DVD). You'll be sacrificing the entire point of it being a storage medium for HD content by trying to chop it down to fit on a DVD.