[onion2k]

You need to blur a face in an image a lot to remove enough data that someone can't unblur it again to get enough information to show the image is of a specific person. If you're really worried about privacy you need to actually block out the pixels in the faces to remove anything an ML model could use to reverse the process.

However, there's still a ton of data in a video besides your face. Your gait if you're walking, your height relative to other things in the video, what you're wearing, etc. It can all be used to prove a person in the footage is you.

If you're really concerned about privacy concentrate on making the video data is properly encrypted, or just don't record it in the first place.