If you understand Russian:
here is a generalized lecture on the defense of Leningrad in 1941. Isaev also has a book: from the border to Leningrad.
Thank you very much. I must admit that I am once again not able to find the book (I see it mentioned on several other sites but was not able to find a site that sells this book) Do you have the ISBN by chance?
Regarding the video: Luckily the auto-translated Subtitles are somewhat ok. 19:21 : Here it is talked about Leningrad Militias (and it is mentioned that they had an abundance of mortars, although no 2:1 abundance is mentioned) so I assume that this is the part you were referring to?
But it reads like he is only referring to one Militia Division(the auto-translation for this part is a bit of a mess, there is even a Donut mentioned for some reason).
(just gonna quote what the auto-translate wrote)(exact time is 19:28)
"Militia Leningrad, it had about 9 thousand people, seven thousand rifles, this is, this is normal, absolutely the number of rifles for a fighter 1 line, she had an abundance of mortars, she had an normal amount of machine guns"
(20:09: Here is the part about the commander that ran over to the germans)
I then went through the transcript and the word militia is only mentioned at the very end two times again (around minute 40 and at 47:44). At 47:44 it is mentioned that the Militia played an important role in the overall strategy.