Ah further reading about the MJ album and this might apply to other promotions too, the promotion ended on the 31st of May not only that but it was only available in certain regions.
It might not have been available to you either because of the date you purchased your phone or because of the region you are in.
Same, you redeem the offer in Xperia Lounge, that promotion runs until 31st of July but again it is region based, some regions have different films or entirely different promotions and some regions don't have anything.
If you don't have any offers available to you in the Xperia Lounge then that means they are unavailable to you.
IMO the films aren't really worth it anyway, they are standard definition and not only that, full of DRM so you can't move them to watch elsewhere such as on your PC or TV etc