大象传媒

The man behind an Irish waterfall video that's become a global online hit, with six million views, reveals the secrets of his creation and describes how it helps people sleep so well.

Visual artist Johnnie Lawson says he doesn't expect people to sit and watch all of his eight hour creation but instead "watch it for a while, allow that image to embed in the mind, then they can take their attention away from the screen but the sound fills the space. The sound is with them all the time".

He also says his waterfall video works because "it has everything..beautiful light coming through...and then there is that water, there's a lovely sense of movement".

This clip is originally from Up All Night 6 May 2015.