How do I change the dimension of an mp4 screen video of an iPhone?

[ShinehahGnolaum]

I would like to change the dimensions of a screen video of an iPhone and keep it's proportions. Basically I need to make it bigger.

I am a real beginner. Is this even possible with Premiere Elements?

[Steve Grisetti]

What do you mean "make it bigger"?

If you've shot it with the phone held upright, you really can't make it magically fill out a video frame, if that's what you're asking. But you can use this method in my tutorial to sort of fudge it.

Using portrait 9:16 phone video in a landscape 16:9 Premiere Elements project - YouTube

[ShinehahGnolaum]

By making it bigger, I mean changing the frame dimensions from 750x1334 to 1080x1920 as required by App Store Connect (formerly iTunes Connect).

[Steve Grisetti]

Are you asking how to output a movie from Premiere Elements at 1920x1080?

[ShinehahGnolaum]

No.

I need an mp4 file of a screen video of an iPhone, which has to have a frame size of 1080x1920, which is in portrait view of the iPhone.

The current frame size is 750x1334.

[Steve Grisetti]

I don't know how to make "a screen video of an iPhone."

I can tell you how to import, edit and output video.

Premiere Elements can not output a video that is taller than it is wide.