Happy New Year!
When it comes to a "High Definition DVD drive", I would suggest installing it in a separate external case, because this "be quiet!" case offers no space for CD/DVD/BD drives in the classic 5¼" installation format.

Hello. Sorry, but who is going to answer this question for you??? A new PC case is supposed to accommodate a 15-20 year old standard? How many people know what an HD-DVD is and how many own one? The answer is probably in the per thousand range. It's hard to understand what you actually want to achieve with this? Why don't you install the successor, a normal Bluray drive? It's state of the art and downward compatible. The technology you mentioned turned out to be a flop and was completely discontinued in 2008.

Wrong case for what you want. User Ingo was quicker, I would have recommended exactly the same.