Complex sentence: Free-to-view (FTV) is a term used in the United Kingdom for certain television channels on the Sky Digital satellite platform which require a working VideoGuard receiver and viewing card to decrypt the signals, but do not require any form of continual subscription.
Split into simpler sentences: Free-to-view (FTV) is a term used for free and encrypted audio and/or video contents. In the United Kingdom, e.g., it's used for certain television channels on the Sky Digital satellite platform which require a working VideoGuard receiver and viewing card to decrypt the signals, but do not require any form of continual subscription.