UE 4.26 Sequencer renders a different view!

Hi. This is driving me crazy.
I’m quite new in UE and probably it’s something i do wrong.

I’m realizing an educational video using Sequencer.
When I render a specific sequence on a specific level scene, the rendered image is different!
How different?

There is a character and a 2D scenario (a video).
Look at the view as it should be (in the sequencer editor) and the final result: the character is lower, its position in the space is different.

How is it possible?!
Thank you.

Unreal - Sequencer view OK.PNG|690x412