I've noticed since One UI 5 if you view a security camera in the Google Home app then minimise and go to watch a video the video's audio will now stutter like crazy every second or less. Doesn't matter where the video is played from; YouTube etc. This even seems to impact recording videos from the phone's native camera apps, completely ruining the video I just shot.
Once you swipe up / close Google Home instantly the problem is solved. This can occur even when the Google Home app is in memory from hours ago - time doesn't solve it, only closing the app.