This Russian documentary, which first aired on Russian TV in 2011, is very similar to western documentaries that cover WWII, except (naturally) it focuses on Russian efforts on the Eastern Front. It's well-made, for this type of show, and it goes into quite a lot of detail. I'd call it a must-see for any westerner interested in a part of WWII that is (quite understandably) usually sparsely covered in western-centric WWII documentaries.
My only complaint is that both the CGI and live-action reenactments are sometimes lacking in production value, so I'm not giving it five stars. But there's nothing about those minor faults to bother any history buff, and the lack of quality is pretty well made up for by the sheer quantity of CGI and live-action that they put into this. And as Stalin (may have) said, quantity has a quality of its own.