Another surprising/unsurprising thing is just how incompetent the Russian Army is.
https://www.rferl.org/a/ukraine-buch.../31728780.html
This is not what a competent army looks like. Russia's army has been reduced to a strategy of annihilation, where rather than engage in a proper assault on its targets it simply bombards them into submission, sending in mech units only when victory is already achieved. There is very little evidence of street to street fighting.
In that sense the second phase of the invasion is not radically different from the first phase. It is based on intimidation, and while the intimidation is far more extreme and damaging in this second phase there is no direct assault that would force Ukrainian submission. That is because the Russian army is incapable of executing such an operation. The mech units can't even reach Kiev, let alone assault it.
The Russian army is invariably overrated, particularly at the start of a war. In this case, there does seem to be a fear that if Russian army is told to conduct an assault it will disintegrate. Massive casualties, huge numbers surrendering, and endless lines of destroyed equipment. As in the video.
That's how revolutions are made in Russia. Not with protest, not with the elite, but with defeated armies returning home. True in 1905, true in 1917, true in 1988.