I'm not an expert with optical technology but I believe your assumption is partially correct. You encoded your video in Blu-ray format, which cannot not be read by your DVD player. I have seen posts that say you can burn the Blu-ray files to a DVD like you did, but you're missing the Blu-ray player that can actually play it.
I'd take the burning Blu-ray to a DVD part with a grain of salt. Some posts said you have to use a ripping program and some said you could just burn it straight to the disc.
Here is where I read that information. I would also assume that burning the Blu-ray to a DVD would give it a bit less quality