The people who voted Brexit didn't know that meant leaving The Single Market

The remoaners including the BBC are pushing the lie that voters didn't know that a vote for Brexit meant leaving the Single Market. Apparently this was kept secret from the voters. 

Watch this from one interview with David Cameron before the referendum, he wasn't exactly hiding that a vote for Brexit meant leaving the Single Market. 

Somehow I doubt that the existence of evidence such as this will stop remoaners and the BBC from continuing to push their lies.