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1.
The act of helping someone's memory of a thing, event or an action by sending them a photo, picture or video of it.

Could be an event, a thing or an action caught on film that someone doesn't remember or "says" they don't remember (a.k.a. plausible deniability or just denial)
I can't believe you don't remember what you did last night, let me send you a video reminder.

Did you say you never wore those hideous clothes, I'll send you a video reminder of you in them?
by TCS, Esq. July 21, 2009