sentences:  "Psycho Path" was included on the Universal Pictures Home Entertainment DVD release of "Psycho", and was Schwarz's first foray into the burgeoning world of DVD bonus features, also known as value added material (VAM).As the DVD format was introduced to the public, all the major studios began offering making-of featurettes and audio commentaries on their discs as an incentive to consumers to replace movies they already owned on VHS or laserdisc.Schwarz capitalized on this moment to segue into producing original bonus content, and soon became one of the leading producers in this field.