Short answers, pulled from the story.
Electrician George Thomas and a team of artists created the first music video in 1894. They were hired by sheet music publishers Edward B. Marks and Joe Stern to produce a visual accompaniment for the song The Little Lost Child. Thomas used a magic lantern to project still images onto a screen while live performances occurred.
MTV launched in 1981 and aired Video Killed the Radio Star by The Buggles as its first video. The channel began an era of 24/7 music on television and played a central role in popular music marketing. This launch coincided with the development of relatively inexpensive and easy-to-use video recording and editing equipment.
The first video to be banned by MTV was Queen's 1982 hit Body Language. The ban occurred due to thinly veiled homoerotic undertones plus much skin and sweat. The channel did air Olivia Newton-John's 1981 video for the hit song Physical, though it ended the clip before the overt homosexual reveal in some airings.
Justify My Love by Madonna remains the best-selling video single of all time. It was released as a video single in 1990 following the blacklisting of the video by MTV. The video single format includes no more than three music videos in the form of a videotape, LaserDisc, or DVD.
Kandy Fong created the first known fan video, or songvid, in 1975. She used still images from Star Trek loaded into a slide carousel and played them in conjunction with a song. Fan videos made using videocassette recorders soon followed this initial experiment.
The Eagles' Farewell 1 Tour-Live from Melbourne in 2005 is the top-certified longform music video according to the RIAA. It achieved 30-time platinum status with three million units shipped. The Rolling Stones' Four Flicks in 2005 is the top-certified music video boxset with 19-time platinum status and 1.9 million units shipped.