MTV was launched in 1981 and originally played music videos 24/7 but now airs various scripted and reality shows. The first video played was "Video Killed the Radio Star" by The Buggles. Due to its success, MTV has launched several spin-off channels that still play music videos. 4Music launched in the UK in 2008 and combines music videos with comedy shows originally from Channel 4. It airs chart shows and covers music festivals. Kerrang! TV, owned by Box Television, airs rock music videos and holds an annual Rock 100 countdown of the most requested videos of the year which usually includes British, American and some European artists.