Disney recently announced that it would be doing a live stream of Illuminations: Reflections of Earth from Epcot on March 28th. Due to some technical difficulties, the live stream has now been pushed back to April 9th, 2019 at 8:55pm.
The live stream is honor of Illuminations soon coming to end after a near 20 year run. The popular Epcot nighttime spectacular will soon be replaced with a temporary show, Epcot Forever. Which will debut at the park sometime in Fall 2019. Later on, Disney will debut Epcot's new permanent nighttime spectacular celebrating music from around the world.
Illuminations currently takes place every night at the center of World Showcase Lagoon at 9pm. There is no official end date as of yet, but the show is slated to close forever this summer.