It does mean, though, that if you do talk in, say,
court, that the discrepancies will capitalized on -- even if they're innocent. Having an absolute reference to measure your fallible memory against in a situation where
any discrepancies may be enough to sink you is... undesirable. Regardless as to if you did or did not do anything. Think that's the major point trying to be made, here. That video records are more likely to do damage to you than not.
Honestly, it doesn't even have to be a situation involving
you, specifically. You could be testifying about something else.
E: Really, what I'd say about all this is it's going to be facebook et al taken even more into the public sphere. That shit is a plainclothes
trap -- albeit one with a certain degree of functionality outside of it -- and on the fly self-recording is just the next step up. Only now it can shove itself into other peoples lives without their consent

I will say that now I'm probably going to have to look more carefully into what exactly counts as "in public." If there's going to be folks walking around randomly taping shit m'gonna' need to be more careful about that.