Sounds like you are using a Youview Box with your TV, which doesn't currently support a NowTV Entertainment Pass and at the moment only provides movies via the NowTV App.
See if you have another playback device from this list instead of your Youview Box.
What @schnapps said, probably, and take care to Cancel the Movies Pass immediately, or it will run on at £11.99 a month when the seven days is over.
Though it will still run for the seven days, so enjoy a movie or two during that time, why not?
If you don’t have a device on the list that @schnapps posted, best pop down to your nearest Curry’s or Argos and snap up a £15 NowTV Stick with a 2 month’s Entertainment voucher.
Install it using the same details you gave on the YouView box, so you have everything on the same one account, settle back tomorrow evening with BLL (anytime, you don’t have to wait until 21:00) and see Mary Louise get hers. We hope.....