In 2002 and 2003, CPR embarked on a pair of cross-Canada tours with 2816. In both years, they ran excursions from Union Station out to Milton and back, using GO equipment. In 2002, I recall, they actually ran the train all the way out to Guelph Junction and turned the whole train on the wye with the Hamilton Sub for the return trip back to Union. That's what that video was of - the train on its outbound trip climbing the escarpment just east of Campbellville.
Really interesting Wikipedia entry on this loco: https://en.wikipedia.org/wiki/Canadian_Pacific_2816