I DONT think this QUITE illustrates your point. What I learned or was reinforced watching this video is how PISS POOR the IS2 is as a front line tank. How easily a Panther brings it down to near death (think about the time it takes an SU85 to take a Panther down in health)
How the IS2 HAS to have AT guns to back it up.
How HARD it is to kill a Tiger even with 3 Vetted Zis.
How much BETTER a Stupa (SturmPanzer4 Brummbar) is at killing infantry than the IS2 (due to its higher ROF not its ability to one hit squads)
And how the KV8 is the best thing in the Soviet arsenal.
Brummbar killing Inf better than IS2? no shit dude
That thing reached 50 kill count only because of the time it survived.
See how many times Brummbar take a shot to a cons, only 1-2 men dead?
But IS2 averagely, if you right it right, stop before it fire, should kill 3 dudes or even squad wipe.
He did use the IS2 in a wrong way, it is not used to deal with Panther or Tiger, but totally rape anything lower than T4
IS2 is like Pershing, but even pwn harder than Pershing, is used to WTFpwn Inf and medium tank, not a head on unit against heavy tanks.