Then there's this playlist by a guy calling himself TIK on YouTube. I've probably shared these before, but he does an absolutely brilliant, in-depth coverage of the entire Stalingrad campaign. He uses great information and gives tons of sources (my book library has been enlarged thanks to these), well researched, good maps, and animations to help bring the entire thing to life.
The first few videos:
If you have any interest in the Stalingrad campaign, I cannot recommend this series highly enough. He's at 49 total videos so far, and counting.