If you don't have a direct firewire or usb connection from the camera to the computer, you may be able to get a video input card or video grabber card like the old snappys for a component video input into your computer.

I transfered my Panasonic IQ Camcorder videos through a Dazzle thingy (49-89dollars Canadian) then imported into PD8 and finally PD9. The dazzle thing has sockests for sound and video and can connect to a VCR. the quality is acceptable altho' not as good as digital videos and the aspect ratio is old format.
Jim Intel i7-2600@3.4Gz Geforce 560ti-1GB Graphic accelerator, windows 7 Premium 12GB memory

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Is your old camera analog?
If it is, do you have a new HD digital camcorder and firewire?
Look at the owner's manual, and see if your new camera (or borrowed) has analog>digital conversion.
If so, you hook up your old camera, via RCA connectors, to your new camera, which in turn is hooked up via firewire to your computer. This piggy-back will work using Windows Movie-Maker, and you might not have to spend a dime, or shilling, or whatever. It may not work in PD unless you actually buy a USB-type converter dongle.

EDIT: I'm thinking "old world". Newer hardrive cameras have USB, not firewire, but the setup is the same. Maybe you could get a VCR device to play your Digital8 tapes inside a VCR-type case. But you'll still need connect to your computer. HP Envy Phoenix/4thGen i7-4770(4@3.4GHz~turbo>3.9)
Nvidia GTX 960(4GB)/16GB DDR3/
Canon Vixia HV30/HF-M40/HF-M41/HF-G20/Olympus E-PL5.
Tape capture using 6 VCR, TBC-1000, Elite BVP4+, Sony D8 camcorder with TBC.
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Thanks everyone for the help! Cyberlink PowerDirector12 Ultra 64bit.

Alienware 18, 4th Gen intel Core i7, Windows 8.1

Apple iMac G5, 9 Years old & slow as a snail!!!

Sony HDR-CX360VE

Sony Cyber-Shot DSCW200.

Nikon D750.

Mitsubishi Lancer Evolution IX FQ360.