Q: How do you delete a movie off your phone

Hello Blackhammer07,

I'm not sure where the movie came from, but if it's a purchased movie, check out this article which discusses all the various content. There's a section for Movies.

How to delete content you've downloaded from the iTunes Store, App Store, iBooks Store, or Mac App Store - Apple Support

If it was synced from your computer, this may help.

Manage content manually on your iPhone, iPad, and iPod - Apple Support

If the video was shot with iPhone you would remove it from the Photos app.

Organize photos and videos - iPhone

Delete a photo or video from Photos.  Tap the Photos tab, tap the photo or video, tap , then tap Delete Photo or Delete Video. Deleted photos and videos are kept in the Recently Deleted album on iPhone, with a badge showing the remaining days until the item is permanently removed from iPhone. To delete the photo or video permanently before the days expire, tap the item, tap Delete, then tap Delete Photo or Delete Video.

Regards,

Nubz