http://vimeo.com/18006254
Basic Introduction to Roto’ing in Nuke

http://vimeo.com/18007792
Animation In RotoPaint

http://vimeo.com/18007954
Wire Removal With RotoPaint

http://vimeo.com/18144241
Working With Layers in Roto

http://vimeo.com/18145007
Painting Onto Geometry With RotoPaint