Here we go:
MTV's roots can be traced back to 1977, when Warner Amex Cable (a joint venture between Warner Communications and American Express) launched the first two-way interactive cable TV system, QUBE, in Columbus, Ohio. The QUBE system offered many specialized channels, including a children's channel called "Pinwheel" which would later become Nickelodeon. One of these specialized channels was Sight On Sound, a music channel that featured concert footage and music oriented TV programs; and with the interactive QUBE service, viewers could vote for their favorite songs and artists. The popularity of the channel on the QUBE system prompted Warner Amex to market the channel nationally to other cable services. That happened at midnight on August 1, 1981, with the adoption of a music video format, and a name change to "MTV - Music Television," an event that started a pop culture phenomenon.
MTV started in New York City in 1981, and became available in most of the United States in the mid-1980s with the nationwide expansion of cable.
Aptly, the first music video shown on MTV was "Video Killed the Radio Star" by The Buggles (with similar tongue-in-cheek humor, the first video shown on MTV Europe was "Money for Nothing", by Dire Straits, which starts with the line "I want my MTV"). The early format of the network was modeled after Top 40 radio. Fresh-faced young men and women were hired to host the show's programming, and to introduce videos that were being played. The term "VJ" (video jockey) was coined, a play on the term "DJ" (disc jockey.) Many VJs eventually became celebrities in their own right. The early music videos that made up the bulk of the network's programming in the '80s were often crude promotional or concert clips from whatever sources could be found; as the popularity of the network rose, and record companies recognized the potential of the medium as a tool to gain recognition and publicity, they began to create increasingly elaborate clips specifically for the network. Several noted film directors got their start creating music videos.