Collections and boxsets that include silent era Harold Lloyd films:
American Slapstick (1914-1929)
American Slapstick, Volume 2 (1915-1937)
Amusement Park Antics (1903-1930)
The Cook and Other Treasures (1917-1920)
A Festival of Silent Comedy, Volume 2 (1916-1926)
A Festival of Silent Comedy, Volume 4 (1919-1927)
The Harold Lloyd Collection (1918-1922)
The Harold Lloyd Collection II (1918-1921)
The Harold Lloyd Comedy Collection, Volume 1 (1919-1936)
The Harold Lloyd Comedy Collection, Volume 2 (1919-1930)
The Harold Lloyd Comedy Collection, Volume 3 (1920-1932)
The Harold Lloyd Comedy Collection Boxset (1919-1936)
Harold Lloyd One-Reel Comedy Classics (1918-1919)
Lost Comedy Classics, Volume 2 (1917-1919)
Silent Comedy Classics Collection, Volume 7 (1919-1927)
Slapstick Encyclopedia (1909-1929)
Smiles and Spectacles: A Harold Lloyd Treasury (1917-1947)
Snub and Marie, Volume 4: Sex, Lies and 9.5mm (1918-1923)

Other Harold Lloyd films available on home video:
Harold Lloyd’s World of Comedy (1962)