I don;t intend to give you a point a click recipe for your analgue transfer for two reasons.

1) It's been disscussed many many times before in these forums, sa have a serach; and
2) Depending on your kit the recipe will be different anyway

but to put some of you fears to bed...

You will need ana analogue to digital converter. Typically these do not plug into the serial port on a PC but into a USB port. I recommend USB2.

Once you have done this then the transfer time is the same as if it were a digital transfer.

In short, transfer/captures occur in real time from your camera no matter whether it is digital or analogue. You press 'play' on your camera and (effectively) 'record' on you PC. So your 4 hour tape will take exactly 4 hours to capture.

The 'high speed' issue is that capturing video, whether analogue or digital need a high speed connection, full stop.

Be warned though, the captured file will not (usually) be compressed and so will be VERY large. Typically, it will be about 1Gb of disk space for five minutes of video. So your 4 hour tape will need 48Gb of space on a hard drive.