The idea is pretty neat imo. Its a simple mechanism. Over the long term I suspect it may even be cheaper to use the robot cause the robot does not need to be fed or managed. I'm tempted to build one myself as the parts cost doesn't look like it'll exceed $1.5K. The music in the video though...

According to https://www.wfft.org/wildlife-general/a-growing-trade-monkey... monkeys cost between $1000-$4000/head

Also do note that monkey based coconut picking is on the decline: https://www.pri.org/stories/2020-08-26/does-thailand-have-mo... Only a small proportion of coconuts are actually picked by monkeys.