Hey @Aleksandar5533 ,
that is odd! Are you able to tell me if this is only happening in low light conditions? What software version is the phone currently running on and are all the apps up to date?
Thanks for that @Aleksandar5533 .
Is this happening in the rear and/or front camera? Can you try to take a video in the same light conditions using a third-party app camera (for example WhatsApp or Instagram) to see if the issue persists?
Its happening to a rear camera. And using third party camera is better than using factory app. I installed random camera app and it takes better video in low light than factory camera app.
Thanks for confirming that. Have you tried a Soft Reset @Aleksandar5533 ? If you haven't done so hold the Power and Volume Down buttons until the phone restarts. Let us know how you get on.