Oh je vois is a common everyday French phrase, literally oh I see, and its life online comes from how useful that simple meaning is as a reaction. Short spoken clips like this circulate on soundboards and in edited videos because they can stand in for a whole facial expression in just over a second. French phrases are often borrowed by non French speakers for comic effect, and this one is used for dry comprehension, polite disbelief, and the moment a conversation takes an unexpected turn.