There are many programs for your phone or tablet that can edit your video. If you own an Apple product, iMovie is an option. If you have a Windows computer, you can download Movie Creator.
But maybe you aren't as technologically savvy as you'd like to be. If not, I have just the software for you.
Corel VideoStudio is an easy, intuitive video editor for Windows-based computers. This software has been with me from the very beginning. I began using it to edit family film and hockey video back in 2000. It offers basic filters, transitions, and effects, green screen/chroma key editing, and a small library of music and templates. The 2018 version also has creative effects such as split screen video, 360 video editing, and stop motion animation. The best part? It usually costs around $79.99, but you can often find specials on their web site for 30 or 40% off.