There's already a few things that I don't care for at first glance. I don't think you need the strikethrough for the change of lead, nor do I think you need to bold or underline anything for emphasis. It isn't really downvote worthy, but it's something I tell people to avoid because of how unnecessary it is. Trust that your readers will pick up on those nuances.
For interview logs and the like, if there is something that isn't dialogue or a subheader, I recommend using italics, just so things don't get blurred together.
So this first log is pretty intense. Some of the dialogue is a bit hammy, like DarkStuff has mentioned, most of the liens being said by Sobakin. You could have left it at the first time that he shouts, say everything was too loud to hear properly, and told the rest of the log through describing the action. There's also a few points were you get into more descriptive, subjective terms like
[22:29]: Dr. Koshka manages to turn the camera up towards her face. Her eyes are wide with fear.
The device also captures Dr. Koshka's breathing, close to the mic, growing heavier, faster.
The female fighters tear into each other with ferocity
Save for that last one, which may be fine and I'm being overly picky, this isn't something you'd see in a clinical document, as they describe too heavily and too prose-like. If you removed the bolded parts, I think it would still get the point across as they rely on the context of the situation.
These newspaper excerpts and accompanying audio logs I think is where things start to dive down. You show a lot of your hand here, giving out a lot of information straight to the reader, even bringing in the tie to ancient ritual bluntly. It's stuff that you could have hinted at or even left out completely. We know what's happening now, so there isn't much more left to solve. And yet there is still one more log.
Overall, I'm not sure how to feel about this. I like the concept, no doubt about it. The way it's executed, though, has me swinging side to side.
The story you are trying to tell here, I think, is good. I like some of these beats that focus more on Koshka and her interactions with the Mothers and her relationship with Sobakin. It provides a lot of spotlight on the depth of the character Koshka. However, the news excerpts and some of the dialogue choices kind of irk me. I could have probably made some of the conclusions entirely from the interrogation log rather than the news excerpts, since it retreads some of that information.
As such, this is a downvote. A lot of the tension was lost in the middle, and it struggles to come back just in time to make the conclusion satisfying to me.