In the United Kingdom where up to 3 physical formats are eligible for the chart, DVD singles are quite common (with the single available on DVD as well as CD and/or vinyl record). As with other single formats, DVD singles have a limited production run, often causing them to become collector's items. The DVD single never experienced a high amount of popularity in the United Kingdom because when artists started releasing them in the early 2000s, the CD single had started declining. They were also seen as expensive. Some artists would not release DVD singles and instead put their music videos as enhanced content on a CD single/album.