In relative terms, it's hard to accurately show a sniper putting in calculations for the Coriolis effect. First off, they now have small computers that calculate for them, and they also zero their scope so even if you do put a camera in the scope with the crosshairs, it wouldn't show their how far off to the left they are. For the sniper, you would just have to talk to them, and they can accurately say they have to account for it.
Artillery is a little bit easier to show. This is an excerpt from WW1 for the Paris Gun
The Paris gun was used to shell Paris at a range of 120 km (75 miles). The distance was so far that the Coriolis effect — the rotation of the Earth — was substantial enough to affect trajectory calculations. The gun was fired at an azimuth of 232 degrees (west-southwest) from Crépy-en Laon, which was at a latitude of 49.5 degrees North. The gunners had to account for the fact that the projectiles landed to the right of where they would have hit if there were no Coriolis effect.
I'm also going to post this in the general, seeing as no FE'er has responded yet