Short answers, pulled from the story.
Daisuke Inoue invented the first karaoke machine in 1971. He created 11 home-made machines called 8 Juke that used 8-track tapes and accepted 100 yen coins. Inoue never patented his machine and eventually lost interest in the business.
Roberto del Rosario patented the Sing-Along System in 1983 and 1986. He developed the machine in the late 1960s as a teaching device for students at his Trebel School of Music. Del Rosario won a patent infringement case against a Chinese company in the 1990s.
The earliest cloud-based streaming device called KaraOK! launched on the 14th of January 2010. StarHub released the device and licensed songs from RIMMS. This technology allowed for smaller devices with over the air updates compared to hard drive-based systems.
At least half a dozen killings of people singing My Way caused newspapers in the Philippines to label the phenomenon My Way killings. These fatal incidents occurred between 2002 and 2012 in connection to karaoke bars and the song popularized by Frank Sinatra. Such violence led some bars to refuse the song and singers to refrain from vocalizing it among strangers.
The YouTube channel Sing King Karaoke reached 11 million subscribers by July 2023. This made it the largest karaoke channel on the platform. The channel provides karaoke content to users globally.