This is the opening sequence from the old school, 60's cartoon 'Birdman', which is the basis for the Adult Swim series 'Harvey Birdman: Attorney at Law'.
When Daffy holds up a card in the phone booth that appears to be blank, that is because of the quality of the video. The first card says: Can bạn not see this telephone is busy? Keep quiet! The một giây card says: Got a Nickel, Mac?