Hey Doug ,
I suggest you use the S-video that is on this unit instead of the Yellow video composite cable .You will still need to use the red & white audio cable.
I have a similar Roxio capture card but it didn't work very well . I hope yours works better.
If you have an SVHS player it outputs more lines of resolution than a standard VHS player . This will give you a better result. I no longe have a SVHS player mine failed some time ago.
Even with a standard VHS player I got better results this way.
I connected a standard VHS player to a standalone DVD recorder via S-Video cable & red/white audio cables.
Then set the DVD unit to record at the best quality it could for the amount of time on the VHS tape,
If you can try both ways & see what looks best to you.
Since the VHS tape has to play in real time anyway the process takes the same amount of time.
The lasers on DVD drives for computers are supposed to be better lasers but for me the way above still produced a better result.
If any of your VHS tapes are commercial movies then there is an additional device to add . If that is the case then that can be covered .
I hope you recorded these VHS tapes at best quality also. The better the input the better the output.