That's simply fantastic news without any of my usual caveats or howevers attached to it. So I will leave this point hanging here all by itself. It is great news. Veritably.
Going forward we need to think about how to build on this.
I am a novice in this area myself. I know some basics that we taught to me by Josh Weisgrau. When I taught 5th grade, I shared my knowledge of these basics and some kids made some very fine short films. (Full disclosure, I am sharing this as an example of a fine short film. This wasn't made solely with iMovie.)
iMovie works great on both IOS and MacOS (short names for iphone operating system (and iPad) and full Mac operating system) . I am more familiar with the iPad version and it works great. It is easy to use, easy to learn and easy to teach. I like how simple it is to craft an nice video. I like how easily it app smashes with other tools such as iMotion, GarageBand and SparkVideo.