The phrase is Flemish dialect from Ghent, where auto is pronounced oto and niet veel becomes nie veel, so the whole line is a local way of saying you know little about cars. The clip is tagged with Romain Deconinck, the Ghent performer long associated with popular theatre in dialect, which helps explain its old school delivery. Short dialect quotes like this circulate on soundboards because they work outside their original context, turning a specific local expression into a general admission of ignorance that Flemish listeners instantly recognise and reuse.