Simply connect a Scart lead from the output of your digibox to the input of your recording device. (VCR, DVD recorder, or whatever).
Set the recording device to record from 'AV' (rather than any numbered channel).
Job done.
Chris
PS: Some recording devices use an alternative label for 'AV'. You might find your handset has a button labelled 'AV1', 'AV2', 'In', 'Line In', 'LIne', 'Ext' or 'Aux', instead of 'AV'