Using videos in screens

Hi all,
I’ve built a screens document that has controls on the parent screen, followed by a whole bunch of child screens each with one instance of the flvplayback component and a video in each.
It works ok offline but when I put it online I realised it was loading all the videos right away - and therefore going painfully slow - rather than loading just the first one and progressively downloading the rest as they’re asked for.
Is there a way of not allowing the screens to dowload until the buttons are pressed to make them start?
Thanks for any advice.
T