Here are two videos of an interview with Yves Baril. They're in French but they both have English subtitles.
While the more specific talk is about banknotes, we do get a glimpse of what I think is his 6c Centennial stamp lying on his desk.
Video two deals with the infamous Devils' Face on the Canadian banknotes, which Yves Baril had to erase. This is his re-engraved portrait.