original question: What is the film series that contains films in  [DVD] format?
answer: sesame street preschool is cool
answer type: Film series.
auxiliary information: DVD is a digital optical disc storage format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. DVDs can be played in multiple types of players, including DVD players. DVDs offer higher storage capacity than compact discs while having the same dimensions. Pre-recorded DVDs are mass-produced using molding machines that physically stamp data onto the DVD. Such discs are known as DVD-ROM, because data can only be read and not written or erased. Blank recordable DVD discs can be recorded once using a DVD recorder and then function as a DVD-ROM. Rewritable DVDs can be recorded and erased many times. DVDs are used in DVD-Video consumer digital video format and in DVD-Audio consumer digital audio format, as well as for authoring DVD discs written in a special AVCHD format to hold high definition material. DVDs containing other types of information may be referred to as DVD data discs.
Which is the film series that contains films in  [DVD] format?