Following Jim Henson's passing on May 16th 1990, two public memorial services were held. The first (featured here) was held in New York at Cathedral of St. John the Divine on May 21, 1990. The second service was held in London at St. Paul's Cathedral on July 2nd 1990.
Learn more about the services here: http://muppet.wikia.com/wiki/Jim_Henson%27s_Memorial
Watch the full memorial service divided into chapters here: https://www.youtube.com/playlist?list=PLgjuhVonbItZ3ohpzh88uMPxs2lemYkMG