Switched to the voice recorder app and both are good.
So.....seems like a software issue where samsung coders forgot to add an automatic limiter to the audio in the video recording app.
Hi trollgods, Could you ensure that your mobile is up to date.The newest update has a number or performance improvements. follow the given steps to update mobile.Step
1. Go to Settings > tap Software update. Step
2. Tap Download and install. Step
3. If new software is available, you can choose Install now, Schedule install or Later.
If you already have software up to date, latest update information will appear as below.
Hi, we request you to generate error reports by following below steps Tap and hold on samsung Members Icon and tap on Error report >> select the category from the below >> Describe the issue and check the option "send system log data" then send.