Matt aka saintjohnrailfan went to Halifax and saw a few trains hither and yon. Here are what I consider to be his best videos.
This is quite a nice night video of CN 121. Doing night video is hard, but Matt did a great job here. What is especially notable about this video is the VIA 6202 RDC on the end of the train.
This video of CN 120 at Enfield, NS is quite nice with the fog and early morning light.
A nice high-speed video of CN 407 at Brookfield, NS just outside Truro.
You can see the whole playlist here.