filmora go
FilmoraGo

Easy-to-Use Video Editing App

appstore
Download on the App Store
Get it on Google Play

Think Bigger From Filmora User Guide

Borders

Adding borders is for the Split Screen feature.

1 Choose the Split Screen template you would like to use.

2 Click the Split Screen and choose the Video tab.

3 Enable the Border option to add borders around the clips in your split-screen.

4 You can adjust the color and size of the border.

Add Border to Video for Splitting Screen
Add Border to Video for Splitting Screen