This is a great idea. The Lexar JumpDrive is a short cable with a USB connector on one end and a lightning connector on the other. Plug the USB side into your computer and copy a few movies over to the now connected flash drive.
Disconnect, then plug the lightning end into your iPhone. Launch the Lexar Mobile Manager app and play the movies from the flash drive. Perfect for bringing along a photo library or movie collection without clogging up your phone’s main storage.
Here’s a link to the Lexar JumpDrive product page.
And here’s a link to the Mobile Manager app.
Prices start at $40 for 16GB. Clever idea.