In 1982, a year after MGM bought and merged with the financially bankrupt United Artists, CBS dropped out of the video partnership with MGM and moved to 20th Century Fox. MGM's video division was renamed MGM/UA Home Video soon after.
In 1986, MGM's pre-1986 library (also including the pre-1948 Warner Bros. library and most US rights to the RKO Pictures library), was acquired by Ted Turner and his company Turner Entertainment. After the library was acquired, MGM/UA signed a deal with Turner to continue distributing the pre-1986 MGM and the pre-1948 Warner Bros. libraries for video release (the rest of the library went to Turner Home Entertainment).
In 1997, MGM/UA began releasing its titles on DVD, just like every other major studio. Some of the films MGM released on DVD were from the Turner catalog, which they were still allowed to keep despite the fact that Turner merged into Time Warner some time before. That same year, MGM acquired Orion Pictures. As a result, Orion Home Video (Orion's home video division) was bought out by MGM/UA, and was retained as an in-name-only division until the acquisition deal was finalized in 1998. In 1998, the company was renamed MGM Home Entertainment.
In 1999, MGM lost the home video rights to the MGM/UA films owned by Turner; those films were transferred to Warner Home Video.
In 2005, following MGM's acquisition by the Sony-led consortium, the company was under the Sony Pictures Home Entertainment label but not using the MGM Home Entertainment name on any releases, which has distributed the MGM library, though under the MGM label. The deal ended a year later.
After MGM ended their distribution agreement with Sony, they announced that they would be signing a new distribution deal with 20th Century Fox Home Entertainment for worldwide release, except for DVD releases of MGM/UA/Columbia TriStar co-releases, which will continue to be distributed by SPHE, since Sony still owns 20% of MGM.
Ironically, Fox had released some post-1986 United Artists films on videocassette during the CBS/Fox Video days.
The unit releases some titles by IFC Films, the pre-1996 PolyGram Filmed Entertainment library, most of the Cannon library, many by Embassy Pictures, the pre-1994 Castle Rock library and Nelson Entertainment, among other companies.