I have footage taken in locations that I have permission to film in, but many people in background who weren't waivered and would have a reasonable expectation of privacy. I'm therefore blurring out faces but I'm wondering whether that's enough? E,g,, a person might be wearing distinctive pants, or rings, or anything else which would be recognizable to both him/her and their acquaintances through which they could be identified. Anyone been in a similar situation?

If I'm not mistaken, as long as you don't see their faces, you are good to go. I have never seen a video on TV where the entire body was blurred.

Thanks Steve, me neither. Just want to be on the safe side. I guess the criteria is not whether someone could identify themselves in the video, but whether they might reasonably be identified by a member of the public.

I'm sure the US laws in that regard are similar to Canadian regs.Here, the assumption is made that the only part of a human body that is not subject to significant change is the face, so blurring facial features is all that's needed.
There can be specific exceptions i.e. a close up of a pair of hands wearing a custom designed set of wedding rings, etc. that are easily identifiable. I would guess that almost always if you were shooting something like that, up close and personal, that you would have obtained a release of some sort anyway