Question: When was The Godfather: The Coppola Restoration released on DVD
About the article "The Godfather", section "Restoration".

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After a restoration of the first two films, "The Godfather: The Coppola Restoration" was released on DVD and Blu-ray Disc on September 23, 2008 from a transfer by Robert A. Harris of Film Preserve.
Coppola's first response to the new transfer, from a question-and-answer session for "The Godfather Part III": "terrific.
"The Blu-ray Disc box set (four discs) includes high-definition extra features on the restoration and film.
They are included on Disc 5 of the DVD box set (five discs).
Other extras are held over from Paramount's 2001 DVD release, although slight differences obtain between the repurposed extras on the DVD and Blu-ray Disc sets; the HD box has more content.
Paramount lists the new (HD) extra features as:
 Godfather World
 The Masterpiece That Almost Wasn't
 ... when the shooting stopped
 Emulsional Rescue Revealing The Godfather
 "The Godfather" on the Red Carpet
 Four Short Films on "The Godfather"
* The Godfather vs.
The Godfather, Part II
* Cannoli
* Riffing on the Riffing
* Clemenza
After a careful restoration of the first two movies, "The Godfather" movies were released on DVD and Blu-ray Disc on September 23, 2008, under the title "The Godfather: The Coppola Restoration".
The work was done by Robert A. Harris of Film Preserve.
The Blu-ray Disc box set (four discs) includes high-definition extra features on the restoration and film.
They are included on Disc 5 of the DVD box set (five discs).
Other extras are ported over from Paramount's 2001 DVD release.
There are slight differences between the repurposed extras on the DVD and Blu-ray Disc sets, with the HD box having more content.
Paramount lists the new (HD) extra features as:  Godfather World  The Masterpiece That Almost Wasn't  ...when the shooting stopped  Emulsional Rescue Revealing The Godfather  "The Godfather" on the Red Carpet  Four Short Films on "The Godfather" * The Godfather vs.
The Godfather, Part II * Cannoli * Riffing on the Riffing * Clemenza  
Coppola created "The Godfather Saga" expressly for American television in a 1975 release that combined "The Godfather" and "The Godfather Part II" with unused footage from those two films in a chronological telling that, because it toned down the violent, sexual, and profane material, received a rating of TV-14 for its NBC debut on November 18, 1977.
In 1981, Paramount released the "Godfather Epic" boxed set, which also told the story of the first two films in chronological order, again with additional scenes, but not redacted for broadcast sensibilities.
Coppola returned to the film again in 1992 when he updated that release with footage from "The Godfather Part III" and more unreleased material.
This home viewing release, under the title "The Godfather Trilogy 1901–1980", had a total run time of 583 minutes (9 hours, 43 minutes), not including the set's bonus documentary by Jeff Werner on the making of the films, "The Godfather Family: A Look Inside".
"The Godfather DVD Collection" was released on October 9, 2001 in a package that contained all three films—each with a commentary track by Coppola—and a bonus disc that featured a 73-minute documentary from 1991 entitled "The Godfather Family: A Look Inside" and other miscellany about the film: the additional scenes originally contained in "The Godfather Saga"; "Francis Coppola's Notebook" (a look inside a notebook the director kept with him at all times during the production of the film); rehearsal footage; a promotional featurette from 1971; and video segments on Gordon Willis's cinematography, Nino Rota's and Carmine Coppola's music, the director, the locations and Mario Puzo's screenplays.
The DVD also held a Corleone family tree, a "Godfather" timeline, and footage of the Academy Award acceptance speeches.
The restoration was confirmed by Francis Ford Coppola during a question-and-answer session for "The Godfather Part III", when he said that he had just seen the new transfer and it was "terrific". 
The theatrical version of "The Godfather" debuted on network television in 1974 with only minor edits.
The next year, Coppola created "The Godfather Saga" expressly for American television in a release that combined "The Godfather" and "The Godfather Part II" with unused footage from those two films in a chronological telling that toned down the violent, sexual, and profane material for its NBC debut on November 18, 1977.
In 1981, Paramount released the "Godfather Epic" boxed set, which also told the story of the first two films in chronological order, again with additional scenes, but not redacted for broadcast sensibilities.
Coppola returned to the film again in 1992 when he updated that release with footage from "The Godfather Part III" and more unreleased material.
This home viewing release, under the title "The Godfather Trilogy 1901–1980", had a total run time of 583 minutes (9 hours, 43 minutes), not including the set's bonus documentary by Jeff Werner on the making of the films, "The Godfather Family: A Look Inside".
"The Godfather DVD Collection" was released on October 9, 2001 in a package that contained all three films—each with a commentary track by Coppola—and a bonus disc that featured a 73-minute documentary from 1991 entitled "The Godfather Family: A Look Inside" and other miscellany about the film: the additional scenes originally contained in "The Godfather Saga"; "Francis Coppola's Notebook" (a look inside a notebook the director kept with him at all times during the production of the film); rehearsal footage; a promotional featurette from 1971; and video segments on Gordon Willis's cinematography, Nino Rota's and Carmine Coppola's music, the director, the locations and Mario Puzo's screenplays.
The DVD also held a Corleone family tree, a "Godfather" timeline, and footage of the Academy Award acceptance speeches. 
During the filming of "The Conversation", Coppola wrote the screenplay for "The Great Gatsby".
However, in the commentary track to the DVD of "The Godfather" Coppola states, "I don't think that script was made."