Share to Mail in iMovie on iPhone
You can share a finished movie or trailer in an email using the Mail app. Sharing a movie or trailer to Mail creates a 360p resolution movie at 30 frames per second (fps), regardless of the original content.
In the iMovie app on your iPhone, do one of the following:
From the Projects browser: Tap the movie or trailer you want to share.
If you’re editing a project: Tap Done (in the upper-left corner) to return to the project details screen, then tap the movie or trailer you want to share.
Tap the Share button , then tap Mail.
Complete the email that was created, then tap Send.