As long as a TV show was shot on film in the past or today on digital video it can be released on Blu-ray. However, to do so is expensive. And because of the convenience and ubiquitousness of streaming, Blu-ray disc sales have flattened, so networks have less & less incentive to do a full Blu-ray release anymore.
Oh, and that YouTube clip was posted by the network itself, so obviously they posted it in HD, but from the original digital source (not from any consumer Blu-ray disc, which apparently haven’t been released).
No. I stream it in HD on Netflix. First 11 seasons currently available. I never got a Blu-Ray player because streaming HD content caught up pretty quick, and my TV upconverts everything to 1080p anyway.
Seriously… who buys popular TV shows on DVD or Blu-Ray? They’ll be in syndication on and off forever, and on streaming media all the time.
The only time it makes any kind of sense to me to get a series on removable media is for example, if the show was a one/two season show that you like for some particular reason, but whose popularity isn’t such that it’ll be syndicated. Even most of those are in streaming media format.
They didn’t “de-sharpen” it. DVDs don’t support HD resolution - they’re a 480i format only. So any HD show released on DVD will look worse than the original broadcast. Even upconverting doesn’t do much - once information is gone, it’s gone, and the interpolation used in upconverting can’t reproduce the original content.
The term ‘upconvert’ in this case refers to a specific technology, where DVD players (and Blu-ray players) are able to play a DVD disc (NOT a Blu-ray disc) and use mathematical trickery to ‘upconvert’ it to look a little better on an HD TV screen. It can’t ‘convert’ it to any higher resolution, it simply uses different digital effects that are less garish looking on an HD TV screen then merely enlarging a standard-def picture. Check out the Wiki article on video scaler.
None of this comes into play in terms of your original question though. The YouTube clip is from the content provider, and they shoot in hi-def, they broadcast in hi-def, they make the show available for streaming in hi-def, and they post their YouTube clips in hi-def. However they have not as yet released the show for purchase on hi-def Blu-ray disc.