Before Mickey Mouse, there was his predecessor: Oswald the Lucky Rabbit. For the first time, we're seeing footage of the first Disney character.
The silent film in black and white dates back to 1928, when a young Walt Disney created Oswald. He didn't own the rights to the character- Universal did - and contract disputes led Disney to break away.
From there, he created Mickey Mouse along with his iconic Walt Disney Company, the parent company of ABC7.