I just found this live video on YouTube. It's Working Man from Rush in Rio - most of it at least; it cuts out during Alex's solo. I also recently posted this video of selected excerpts from Rush in Rio including the animated opening sequence, One Little Victory, New World Man, Earthshine, YYZ and Tom Sawyer; and you can also watch the entire YYZ performance here.
NOTE: Posts over 10 years old are partially archived. All comments, images and other embedded media have been removed.