Try launching the file from outside of LW. Go to your LW library, click on Saved Files then Explore. Your saved folder will open for you, try launching from there. Are you getting any error messages from RP?
If it doesn't launch with RP, right click on the file > open with & choose VLC. There shouldn't be any codecs issues with VLC, if it won't play it then there's probably something wrong with the file.

What stupid bloody Aussies... I thought we were all brilliant?