Well the first thing I tried was a TV card by Pinnacle, because by obvious logic if it can record stuff from an aerial then it should be able to do the same with an analogue camcorder. Unfortunately the software was a a big pile of crap (and now I will avoid any Pinnacle products at all cost) and there was no way to tell if the hardware was installed properly, so I never managed to record anything using it. Also, the options in the software didn't correspond with the options in the manual and I couldn't seem to work out how to do anything with it.
So after all that fuss I took it back, and the next day read up on what exactly it is that I want. I found that it's called a
Video capture card, and so looked online for a bit for said hardware. I know that video capture devices exist that connect via USB, but I know that unless it's USB v2 it's going to be very bad quality (from what I've read), and this computer is rather old, so I wanted a device that would plug into a PCI socket. I found this thing
here that looks compatible with my PC. Not very good quality, but compatible at least. I haven't yet actually bought it or anything like it yet, because I've been busy with other stuff and haven't really thought about it.