Como puedo cambiar el tamaño de los videos que genero para que se vean Vertical y centrado en un celular? ej 750 x 1334 pixels.

How can I change the size of the videos so that it looks Vertical and centered on a cell phone? ex. 750 x 1334 pixels

You could build your project sideways in videoscribe and then publish the video and use a video editing program to rotate, scale, and crop it.

merhaba video düzenleyici program hakkındaki öneriniz nedir?

Here are some reviews for free or inexpensive video editing programs:

https://www.tomsguide.com/us/best-video-editing-software,review-2167.html