Here is "The Jewish Letter Carrier" -
one episodes in the documentary web-series: 
"The Oneg Shabbat Underground Archive in the Warsaw Ghetto"

commissioned work for yad vashem 

Director: Mika Orr
Producer: Gili Nadav
Art Director, Design and Animation - Jewboy Corp™: Yaron Shin
Art and Illustration: Tslil Yogev
Animation: Guy Ben Haim
Narration: Bryan Kopta
Music by: Adam Ben Amiti
Cello: Maya Belsitzman
Production design & after effects: Ohad Elimelech
Sound editor: Itai Matos
Produced by Mikooka Productions