This is a good question, and I am probably the worst person to answer this as I've never done it, but I'll give it a go to maybe get the ball rolling.
Okay, so I was able to hack a solution by placing items that I wanted to have horizontal scroll into an element with display:flex, and overflow:auto.
As you may know, display:flex isn't handled well in all browsers: http://caniuse.com/#feat=flexbox
You can view my hack at the following video and Webflow share link:
I would love to hear of any other solutions from our community as you've peaked my interest
Hopefully this helps