Very interesting videos. It appears the vehicle started in -30 in Canada, which I presume is Fahrenheit, which is a reasonable cold temperature to play with.
My interest is fuel/cost efficiency, which they never got into.
Our 2015 Subaru 4 cyl Outback will get 30+ mpg summer at 70 degrees. Winter it drops to 25 mpg at around 0 degrees. Tomorrow we will go to town (90 miles away) to shop, and it is expected to be -20 to -25 degrees. I expect the Subaru to get about 21, maybe 22 mpg.
Anyway, if a hydrogen fuel cell type vehicle can compete with this, I see it as marketable. If a hydrogen fuel cell truck can compete with a diesel with regards to fuel economy, it may succeed.
One thing nice about Toyota, is they will have the quality built into it before they try and market it. They should also have good creature comforts such as a cab heater/defroster, heated seats, heated mirrors and electrically heated windshield.
Toyota's Hydrogen Electric Mirai has been on the market for sale since August, 2015. Youtube has lots of reviews and test drives, if you're interested. This was the first Mirai commercial (which Toyota has pulled for some reason, presumably the use of the BS word) showing that the car could actually be fueled by BS: https://www.youtube.com/watch?v=mx0zmIR51ZI