Capture card lets you watch cable or TV thur an atenna.Bought a cheap $10 card i still use.this just lest you watch TV.Cards are around 40 or 50 with remote.
Is the cheapest way to make a PVR.Though a 1 hour program takes about 1 gig. they got a free trial to check it out.Cost 70 buck's for program and no monthly fee's.My VCR is junk now.
Tivo is another way but you need to buy a Tivo box and they charge you by the month for listing's.
AIW is another but i really dont recommand it.If you up date your card and you dont get another AIW you lose your capture card.Buying a seperate card for capturing is best.