Disney's Snow White and the Seven Dwarfs has become the top-selling video and DVD animated title of all time overseas, reported variety, with the DVD selling 8 million units since its release. Adding in the sales for the original video release in 1994, the total is 26 million units, stealing the crown from previous record holder The Lion King, which sold 24 million copies.
Even before DVD, Disney was making a killing in the home video market. Read about it in Dig This! Millions of Disney Videos.
Also, check out Jerry Beck's review of the Snow White DVD.