Which story creation apps don't ruin video quality?

Question

iOS

I make videos on iPhone12, share them on Instagram stories.
I want to add different music tracks.
How best to do it. Shoot separate videos and overlay music through some application.
Or immediately use an application that allows you to work with Instagram stories and overlay music?
The main task is to maintain quality.
I know that some applications cut down a lot in quality.

Answer 1

All standard applications do not cut the quality or have a quality setting, you can set any, the problem is clearly contrived by you, so try what you like.

Answer 2

I personally can’t say anything about creating a video for stories on Instagram, but stories for a website are another matter. I recently noticed a trend towards creating stories on websites. Indeed, for the time being, an unusual and working tool for improving conversion and engagement. I thought that it was not easy to do this, especially with high quality, but everything turned out to be quite clear and simple. I found all the necessary information here https://flyvi.io/ru . The service is suitable, it allows you to create and upload stories to the site.