I don't recall it having snowed in Lahti yesterday. But in Tampere it could've. Or the video may have been shot the day before yesterday. Tampere is about 120 km closer to the source of this nasty cold spell (the prevailing wind direction has been northwesterly). The cold weather did not cause too much real danger or harm, not even in traffic.
I made a couple of posts about it:
The day before yesterday:
https://peakd.com/hive-148441/@markkujantunen/welcome-to-winter-wonderland
Yesterday:
It was Tampere yesterday, my sister in law sent a pic and Taraz some video. I'll look at the posts.