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HD DVD - Wikipedia
What Ever Happened to HD-DVD? - How-To Geek
What is HD-DVD (high-definition DVD)? - TechTarget
High-definition optical disc format war - Wikipedia
Blu-ray vs HD DVD: which video format is for you? - CNET
Comparison of high-definition optical disc formats - Wikipedia
How HD-DVD Works | HowStuffWorks
HD DVD: the format that nearly beat Blu-ray | Den of Geek
The Rise and Fall of HD-DVD - IGN
HD DVD - Wikiwand