Canva
canva.com
Canva is really user friendly program. Beyond the basics, it includes a great library of images, stickers, and fonts you can easily add to your design.
Canva can be used in a browser via an app.
Cost
Canva is mostly free, but requires a monthly fee to save transparent files (overlays, for example). Certain stickers and graphics come with an additional fee.
If you just have a one-time event, consider using their free trial!
Pixlr E and Pixlr X
pixlr.com
Pixlr is an online tool that is a bit more advanced than Canva.
Pixlr E is similar to Photoshop, while Pixlr X is easier to navigate if you're not familiar with Photoshop.
Cost
It's easy to use Pixlr for free. They do offer a library of stickers, some of which are free and some will cost you.
Outsource The Work
fiverr.com, upwork,com, 99designs.com, and others
Don't feel like figuring this part of it out? Hire a designer to create your booth's graphics for you.
Plenty of companies provide graphics design services online.
Be sure you share the proper sizing specs with them before they get to work!
Cost
Varies, with many in the $5-$30+ range depending on your needs.
Video Editing
Editing videos requires unique software. Most video editing software must be downloaded to a computer (videos typically are not edited in web browsers).
OpenShot Video Editor
openshot.org
An easy to use open source video editor that comes with a built in tutorial to get you started.
Cost
Free.
iMovie
iMovie is a free tool that comes preinstalled on Mac computers, it can be used to make both simple and complex edits to videos.
The settings can feel difficult to understand at first, but the user guide below includes a ton of helpful resources to walk you through any hurdles.
Cost
Free to Mac users.
Adobe Premiere Rush or Premiere Pro
Adobe’s answers to video editing, the Premiere programs feel similar to Photoshop and is not for beginners.
Cost
Both programs offer a free trial, and upgrading to a paid plan offers unlimited use and features.