Well, I studied this play at high school and was pretty shocked you can imagine! I bought this DVD, because I was studying the play again for my uni finals, and, in short, it is the perfect companion for the script, a play which is typical of the Pinteresque style of absurd theatre.
A young philosophy professor returns home to London from America to visit his estranged working-class family with his new wife. His family is revealed to have a less than savoury history and lifestyle. The remainder of the play charts the domestic disputes within the family, explicit and implicit, and the power struggles between his father, Max, and his brother, Lenny. What it all amounts to is a brutal and unreserved portrayal of the darker side of consciousness, which questions the very foundations of morality.
The unreality of the play lends itself to many artisitic possibilities. For example, the action can symbolise unconscious processes more explicitly, in this case, sexual perversion and violence, without the use of what would be considered unrealistic language in a realistic play. The famous Pinteresque loaded silence represents this aspect well, as well as the undertones that can be infused by good actors into seemingly innocuous words. The same goes for the random acts of violence and sexual activity which punctuate the dialogue.
Furthermore, the constant shifts between conscious and unconscious actions, the masking and unmasking of the characters, makes for a real challenge for the actors. Thankfully, in this production, the calibre of the acting is unbelievably high. If you want to know why Ian Holm was in everything after this film, watch his performance as Lenny. Pinter's ex-wife, Vivien Merchant, plays the lead and is also superb.
If you want to watch the definitive production of The Homecoming, this is what you are seeking. On a side note, I believe (though may be mistaken) that Pinter himself took a role in the production.