Yankee Doodle Dandy - Platform: DVD

Hidden interview (Special Edition):
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Insert Disc 2. Enter the "Special Features" menu. Highlight the "James Cagney: 
Top Of The World" option, then press Right to highlight his hat. 
Press Enter to view an interview with Joel Grey.

Hidden clip (Special Edition):
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Insert Disc 2. Enter the "Special Features" menu. Highlight the "Let 
Freedom Sing: The Story Of Yankee Doodle Dandy" option, then press Right 
to highlight James Cagney's handkerchief. Press Enter to view the 
"Joan Leslie's 17th Birthday" clip.