"In my mind and in my car, we can't rewind, we've gone too far," sang The Buggles in their hit "Video Killed The Radio Star", the 1981 track that launched a phenomenon known as music television. A quarter of a century later, MTV is an enterprise that reaches 400 million viewers in 167 countries through a roster of presenters who collectively speak 22 languages.
Yet now that the MTV generation has grown up, the media landscape has changed in a way that would have the Buggles mastermind Trevor Horn wiping the lenses of his enormous spectacles in disbelief.
The music video most certainly has not killed the radio star - not when Terry Wogan can still command a UK audience of seven million on Radio 2, while music television cannot reach 500,000. In fact, 25 years after the birth of MTV, it is the conventional music video itself that is having to adapt to survive.
Children are increasingly demanding such content on their personal computers, their MP3 players and their mobile phones. On television, where MTV once reigned almost unopposed, the pioneer faces fierce competition.
Andy Duncan, the chief executive of Channel 4, which has made music central to its strategy, said: "I think MTV has been a great brand and is doing some exciting and innovative things but it's a tougher world it's going into, compared to the one it has come from." He noted that the Red Hot Chili Peppers and other star acts had chosen to launch their new videos on Channel 4, where they could expect to reach a larger audience than on digital television.
MTV, which has never had quite the same status in the UK as it has in the US - where it is a staple of pop culture - has faced growing competition with the emergence of a raft of new music channels. Nick Dereka, channel manager of Channel U, launched in 2003 to cover "urban" music genres, including hip hop, said: "Music is everywhere now and there are niche operators opening up almost every day. MTV is, in my view, too generic and there's just too much crammed into too little a space."
To protect its market share, MTV has diversified into a family of channels, including VH1, MTV Dance, MTV Base, MTV Hits and VH1 Classic. At the same time it has moved away from being simply a broadcaster of music videos towards a more imaginative programming policy that has resulted in a succession of hit shows such as The Osbournes and Jackass. The Radio 1 rap DJ Tim Westwood was brought in to make a successful British version of the hit US show Pimp My Ride.
Some media analysts believe that MTV, which is part of the US-based media empire Viacom, is clever enough to reinvent itself for the future. Chris Hayward, the head of broadcast for Zenith Optimedia, said MTV had faced "challenges" because its young target audience was at the vanguard of rapidly-evolving technologies. "The audience is happy taking music videos on their mobile phones and is at ease with computers. I don't think it's by any stretch of the imagination a criticism of MTV that the enormous advances in technology in the past five years have been significant challenges to MTV in retaining its share of the audience," he said. "But MTV has the talent base to be very healthy in the future."
The channel's position has also been challenged by social networking websites such as MySpace.com, which recognise that young people are no longer satisfied with being merely passive consumers of music. MTV is well aware of this. Yesterday it launched its own community website, MTV Flux, which will allow members to upload their own content on to television. It is also at the forefront of providing music video, animation and other content to users of mobile phones.
Video Killed The Radio Star The Buggles
It was actually released in 1979, but this somewhat naff but entirely appropriately titled video had the honour of opening MTV on 1 August, 1981
Rio Duran Duran
With sexy "Girls on Film" and glamorous "Rio" shot on 35mm film rather than videotape, New Romantic boys Duran Duran and MTV were perfect partners
Thriller Michael Jackson
A 16-minute epic, taking the rock video into new territory, directed by John Landis and featuring a parade of dancing ghouls, including one named Michael Jackson
Two Tribes Frankie Goes To Hollywood
Relatively unknown groups begin to use the medium artfully, as in this Cold War wrestling match, with Holly Johnson as ringmaster
Money For Nothing Dire Straits
Another film that defined the channel's early years, with computer graphics and Mark Knopfler's MTV-referenced lyrics a tribute to its growing influence
Sledge-Hammer Peter Gabriel
Robert Palmer and his cloned backing band may have been definitely sexier, but Peter Gabriel's Claymation epic was the innovative video of the year
Fight For Your Right (to party) Beastie Boys
Rap would eventually dominate world of MTV and this early success from the first white rappers quickly became an early MTV staple
I Should Be So Lucky Kylie Minogue
Neighbours star Kylie flounced around telling us she was so lucky, but with no clues as to why (that fringe was definitely a misfortune). Could have been shot in 1958
Like A Prayer Madonna
Madonna crafts videos as carefully as her songs; here, the controversial Catholic imagery lost her a $5m Pepsi sponsorship deal. Voted top video by MTV viewers
Nothing Compares 2 U Sinead O'Connor
Wacky singer's version of Prince's anthem for the broken-hearted. Featured moody shots of Paris and a single tear shed in close-up
Unfinished Sympathy Massive Attack
Filmed in one take, singer Shara Nelson strides through a Los Angeles neighbourhood, indifferent to the action around her. Simple, but elegiac
Bohemian Rhapsody Queen
When it was first released in 1975, it pioneered the filming of rock music in the new video medium. It topped the charts again in 1992
Everybody Hurts REM
REM's hymn of comfort to those contemplating suicide was directed by Ridley Scott's son Jake. It portrays the inner thoughts of those stuck in a traffic jam
Sabotage Beastie Boys
This parody of an American television cop show marked the debut of director Spike Jonze, who would later go on to direct videos for Fatboy Slim and others
Common People Pulp
Michael and Janet Jackson's "Scream" was the most expensive pop video ever. But Jarvis Cocker in a shopping trolley pushed by Sadie Frost was much more fun
Wannabe Spice Girls
Girl power blasted its way into our lives as the five Spices careered around a hotel. This video was also said to have been done in one take. It all seems so long ago...
Smack My Bitch Up The Prodigy
Sex and violence, with a terrific final twist. MTV would only screen it at night; recently voted "Most Controversial MTV Video of All Time"
The Sweetest Thing U2
Bono's video apology to his wife features a parade of her favourite things, including Boyzone popping up to sing the chorus. Great idea, great fun
Baby One More Time Britney Spears
The phenomenon that is Britney was launched with this schoolgirl fantasy and an impossibly catchy hook. The first of many mega-hits
The white rapper shot to fame with this dark story of an obsessive fan. The song featured Dido as his doomed and pregnant wife and she also became a star on the back of it
Can't Get You Out Of My Head Kylie Minogue
Kylie is one of the queens of MTV, with hits in three different decades. This futuristic-styled dance number was essentially a Kraftwerk tribute
Dirrty Christina Aguilera
Mud-wrestling, bondage and a flick of sado-masochism feature as Christina tries to out-raunch Britney. Great video, shame about the song
Crazy In Love Beyonce
Once freed from the pop constraints of Destiny's Child, Beyoncé shows she can get down and dirty in a vest with the best, abetted by rapper Jay-Z
Call On Me Eric Prydz
While hip hop videos get ever more explicit, unknown Swedish DJ Prydz produced this conventionally styled Dirty Dancing update complete with leg-warmers
Lose Control Missy Elliot
After 25 years of innovation, it's back to basics. Terrific dancing helped this slice of hip hop to win a Grammy and a raft of MTV award nominations last year