YouTube, which is owned by Google, has just introduced a new face-blurring tool on the site, which allows users to blur “all” faces on video with a simple click. It is not error-free and some faces would be undetected, hence not blurred. Right now, we are not allowed to only blur specific faces.
This is considered a major step for a video sharing site and in fact, YouTube is the only website that offers this. Face-blurring uses the same technology as Google’s Street View which blurs the license plate of vehicles. The technology has been ported to YouTube.
Anyway, despite being able to blur faces, sometimes we can still pick out people or places, especially if we are familiar with the location so it’s still not entirely safe.