That's a good reference...
Series termination is close but not really a match for your situation for a few reasons: 1) your line length is much shorter than the transition time for LS logic and does not act like a true transmission line, and 2) the output stage of the LS is not symmetric, over 100 hundred ohms when driving high and maybe a few hundred milliohms when pulling low.
You don't have a choice because it is not possible for you to series terminate and your logic does not have enough drive to develop valid logic levels across a resistor parallel termination.
Right- crosstalk results from the capacitive coupling between the lines and high impedances at the source and receive ends. You told us you were using bundled VGA cable, and those lines should be miniature 75 ohm coaxial. If you ground the shields then crosstalk is greatly attenuated, and by maintaining a low impedance at the receiver as I suggested, the crosstalk is further attenuated. I went with 82 ohms because it a common value and is less than 5% mismatch reflection for 75 ohm lines, which is more than tolerable. The 82 ohm in series with the drivers does provide a series match on the logic low transition which your destination triggers on but does not help much on the logic high transition. It does help reduce crosstalk though. That ac-termination should be right up between the center conductor and shield of the cable.