To ensure you are downloading a "verified" or safe version of iMovie 10.3.3: Mac App Store (Recommended):
Searching for "iMovie 10.3.3 dmg verified" typically leads to results about finding safe, archived versions of Apple's video editing software for older macOS systems. iMovie 10.3.3 Overview imovie 1033 dmg verified
You can also download iMovie from the Mac App Store directly. Open the App Store on your Mac, search for iMovie, and click on the download/install button. To ensure you are downloading a "verified" or