Camera video issue..shadow trail

[Filip Arsenijevic]

I just got my s8 used in mint condition with more than 17 months of warranty but i have an issue..
So when i enter the video recording mode , it starts emiting some trail shadows on any video i make , im having the phone for like 7 days but i just tried the recording today when i noticed it..some images thst are in the picture start reproducing as some trail or a duplicate video going paralely as original one..i dont know how to describe it...can anyone help ?