Collections and boxsets that include silent era Buster Keaton films:
Arbuckle & Keaton, Volume 1 (1917-1919)
Arbuckle & Keaton, Volume 2 (1918-1920)
The Art of Buster Keaton (1920-1962)
The Best Arbuckle Keaton Collection (1917-1920)
Buster Keaton Collection (1928-1930)
Buster Keaton: The Complete Short Films 1917-1923 (1917-1923)
Buster Keaton: The Short Films Collection 1920-1923 (1920-1923)
The Cook and Other Treasures (1917-1920)
Famous Comedy Legends, Volume 1 (1915-1947)
Famous Comedy Legends, Volume 2 (1916-1949)
The Forgotten Films of Roscoe Arbuckle (1913-1932)
Keaton Plus (1921-1962)
Keystone Kops Festival / Buster Keaton Festival (1913-1922)
The Ultimate Buster Keaton Collection (1920-1937)
Wild and Weird: 14 Fascinating and Innovative Films
with New Music (1902-1965)

About Buster Keaton:
Buster Keaton: A Hard Act to Follow (1987)
Buster Keaton Rides Again (1965)
So Funny It Hurt: Buster Keaton at MGM (2004)

Other Buster Keaton films available on home video:
Film (1965)
The Railrodder (1965) with Buster Keaton Rides Again (1965)
The Twilight Zone, Volume 10 includes episode
“Once Upon a Time” starring Buster Keaton