Short answers, pulled from the story.
Edward B. Marks and Joe Stern hired electrician George Thomas to project still images during live performances of The Little Lost Child, creating an early illustrated song that marked the first step toward what we now call the music video.
American cable channel MTV launched its first broadcast on the 1st of August 1981 with The Buggles' Video Killed the Radio Star, beginning an era of 24/7 music television.
Michael Jackson's Thriller video released in 1983 cost US $800,000 to film and became instrumental in getting music videos by African-American artists played on MTV after being directed by John Landis.
Queen's Body Language became the first video banned by MTV in 1982 due to thinly veiled homoerotic undertones plus excessive skin exposure despite fully clothed band members wearing minimal attire.
Billboard introduced Top Music Videocassette chart the 30th of March 1985 tracking weekly best-selling music video sales in United States with Tina Turner's Private Dancer reaching number first.