Video conferencing question?

I bought two identical HP laptops so that my family and I can chat via video when I’m out of town. Both have built-in webcams. What’s next? I don’t recognize any of the preinstalled software as video-conferencing software? Do I need to download specific software to communicate between the two laptops? Is there a freeware or at least try-before-you-buy software that will do the trick? (Both have MS Office Ultimate and all the bells/whistles if that helps)
Many thanks and 10 pts. to the person with simple and accurate answers.

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