Thanks for the video, although I do think a lot could be improved.
Not systematic enough.
You are too often just stating what you prefer, instead of making it obvious why you prefer one over another.
If you demonstrate a feature on one device, you should also demonstrate it on the other, or it is not a comparison (Notifications).
You compared bb's app list (grid of icons) to wp's live tiles. I think a fairer comparison would need to introduce more of bb's UI.
The Lumia's screen was far too bright and often outside the area your video recorder had in focus. That made the Lumia's screen look pretty awful.