Anecdotally speaking, I haven't witnessed things in their "The Russian Dash-Cam Supercut" video even once. I can confirm that lots of people disregard rules if they think they can get away with it, though. Things like not lowering speed before the yield sign or going full speed through the crossing on yellow traffic light account for majority of the accidents involving two cars. Crossing the road in the wrong place causes most pedestrian deaths.
Statistically speaking, we've got 3-5 times more fatalities than EU countries per capita and about 1.5-2 times more than in US, from what I've found. Some of these accidents happen due to weather and poor road maintenance, but you can't really blame the weather much, since the situation is much better in neighbor Finland.
Sounds like Boston...
1. Article is mostly based on CHP community posts and comments. Their data is strongly skewed toward scary stuff (which is the only type of content that is posted there)
2. There are several categories of horrible things that can happen to you, but mostly you can avoid them. However, sometimes you can't, and sometimes it's batshit crazy. For example, couple of months ago, some road crash with some heated argument happened in St. Petersburg. One of the participants of that argument died from five knife wounds to the chest. Investigative Committee alleged that (sic!) the man committed suicide (google Grigory Kochnev). You can't make this shit up.
3. Russians themselves are mostly fine, but corruption is on super-high levels and these people are not sent as alien agents from space. Saltykov-Shchedrin, great Russian satirist, wrote more than a hundred years ago: "If I were to doze off and re-awake in a hundred years and someone asked me what is happening in Russia, my answer would be unhesitating: people are drinking and stealing".
4. If you are to visit Russia as a tourist, you are reasonably safe. But I'd never advice anyone to open business in or relocate to Russia. Unless you want to deal with truly kafkaesque things every single day.