3 equal columns in a different page

In one of my pages, I am trying to divide the page with 3 vertical bodies of the same height (similar to the presentation columns in the home page), the only work around to it that I’ve found is set the page type to “three column with sidebar on left and right”. However by using that option, I can increase the width of the side bars, but if I decrease the width of the central column, that will have a effect on all the other page. And its a little more complicated because I want images and text on the side columns and have an video and text in the center, and although I have figured out how to put pictures in the side columns formatting is not easy; and it also means I can not use the side columns anywhere else in my website

Is there an easy way to do this?