An erroneous reference to a Blu-ray disc. The Blu-ray format has 1,080 lines of resolution (HD), whereas DVDs have 480 lines in the U.S. and 576 elsewhere (SD). See Blu-ray, DVD, HD formats and SD formats.
"Blu-ray DVD." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/blu-ray-dvd>.
Blu-ray DVD. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/blu-ray-dvd