How to Clear Videos you’ve Watched on Facebook | Clear All Facebook Video Watched History
If we click log to actions and other activity. You can select videos you’ve watched to delete one of these videos from your history you can select the three dots beside the video for more options.
Once you are on the activity page, click on the posts tab so it will show only posts activity. now go to the extension icon tab and click on it to open the extension. once the extension open, you can set auto delete for all post at once for all or specific year and month.