Grandmother surfs to YouTube stardom KATHRYN GREENAWAY The Gazette Wednesday, January 03, 2007 Hanna Tennenhaus looks at family pictures at home. She has 16 grandchildren and 32 great-grandchildren. Montreal grandmother Hanna Tennenhaus doesn't own a computer and until recently had never heard of the popular everyman video-broadcast website YouTube. Doesn't matter. In the last 48 hours, Tennenhaus has become the toast of the website thanks to a New Year's greeting she recorded for her family. It's an impressive family that includes four children, 16 grandchildren and 32 great-grandchildren (with three more on the way.) "YouTube? Does that have something to do with U-boats?" Tennenhaus, 83, asked with a laugh when reached by telephone yesterday. Tennenhaus's flash fame is a testament to the unpredictability of cyberspace, where, inexplicably, an otherwise unremarkable one-minute New Year's greeting from Grandma can surf its way to stardom. Even ABC'...