Flood light cam sensitiviy deteriorating

flood cam was bought and used for 5 years at another address and moved last year. it was working within expectations untill 3 months ago. now the light sensitivity works fine and the snapshots are working as advertized. but the camera record has become unreliable. It did not cover any acitvity during holloween night with over 60 groups stopping buy. when the live recording is activated the sensor functions works but sometime only record part of the video while recording all the audion or just a black screen with audio.