Monitor JWPLayer video as Web Object complete

The ever-brilliant Matt Bibby got in touch and let me know that if I simply removed the inverted commas around the instances of the words TRUE and FALSE in my code the thing should work, and it does!

jwplayer().on('play', function(e) {
 var player = window.parent.GetPlayer();
 player.SetVar("zJWP_Completed", false);
 player.SetVar("zJWP_Started", true);
});
jwplayer().on('complete', function(e) {
 
 var player = window.parent.GetPlayer();
 player.SetVar("zJWP_Completed", true);
 player.SetVar("zJWP_Started", false);
 });
function playVideo(){
 playerInstance.play(true);
 }

With inverted commas, Storyline sees a string. Without, it sees a True/False variable. So now you know.

No, don't ask me what a string is. I think there's a theory about that.