Simplify the following text for a Grade 14 native English-speaking person.
Original: As the DVD format supplants the videocassette , companies have increasingly released movies in DVD format rather than VHS , causing the term `` direct-to-DVD '' to replace `` direct-to-video '' in some instances .
Simplified: As the DVD format supplanted the videocassette , companies released movies in DVD format rather than VHS , causing the term `` direct-to-DVD '' to replace `` direct-to-video '' in some instances .