Nearly all DVD home video products are protected against unauthorized distribution outside their licensed territories by what is known as region encoding.
Region 4 DVDs are encoded discs that are playable only on DVD players manufactured for use in Mexico, Guatemala, Honduras, British Honduras, El Salvador, Nicaragua, Costa Rica, Panama, Cuba, Jamaica, Haiti, the Dominican Republic, the Bahama islands, and the West Indies, Brazil, Chile, Peru, Colombia, Venezuela, Guyana, Bolivia and other South American countries, Australia, New Zealand and other southwest Pacific countries. Depending on the country’s dominant television format, Region 4 DVDs are either PAL or NTSC format discs.
Region 4 NTSC or PAL discs will not play on most American DVD players. Many Region 4 DVD players are manufactured to play both PAL and NTSC discs, regardless of region encoding (consult your player’s manual).