I had trouble making out what people were saying in the vox transmissions so here are the videos in readable text form (taken from the very well made closed captions, or edited where missing):
Vox Transmissions
Tertium Vox Intercepts
Vox Transmissions
I
[static/distortion]
This is Wyrmwood.
I repeat, this is Wyrmwood.
This is Wyrmwood calling Mourningstar.
I am using Secure Vox Encrypt Alpha Six.
Mourningstar, respond and confirm.
This is Wyrmwood. I repeat, this is Wyrmwood.
[static/distortion]
–Initial report begins.
I have reached Atoma and am now embedded in the main hive, Tertium Prime.
My presence is undetected at this time.
Tell the master that he was right.
There is heresy here.
The signs of it are slight, as yet, but I can
detect its unmistakable trace.
I will compile a full report once I have conducted more thorough investigations of the sitation in the hive.
[static/distortion]
–The Vox transmission signal is bad.
Please, respond.
The master is needed here urgently.
The source of the heresy must be found and stamped out before it escalates.
This is Wyrmwood, using Secure Vox Encrypt Alpha Six–
[static/transmission terminates]
II
[static/distortion]
This is Wyrmwood calling Mourningstar.
–repeat, this is Wyrmwood calling Mourningstar.
I am using Secure Vox Encrypt Gamma Two.
Mourningstar, respond.
I have detected–
–Moebian Sixth 4th brigade assemble in the embarkation.
Support elements report to area 17–
[static/distortion]
–Can you hear me? The signal is poor.
Mourningstar, acknowledge.
I repeat, I have detected indications of cult activity in the lower and mid-levels of the hive.
They are covert, keen to keep themselves
hidden amongst the population.
But there are signs of ritual activity, and I have seen unholy sigils
carved on walls and doors.
I cannot decipher them, but they are clearly intended to pass clandestine messages between cult cells.
I urge–
[static/distortion/fragments of
other voice transmissions]
Oh, the God-Emperor damn this vox!
I’m not even sure you’re receiving these reports, Mourningstar.
Please, respond and confirm.
You are needed here now.
There is a great evil arising, and I cannot battle it alone.
Mourningstar, this is Wyrmwood,
using Secure Vox Encrypt Gamma Two–
[static/transmission terminates]
III
[static/distortion]
–Mourningstar, Mourningstar, respond and confirm.
This is Wyrmwood.
I am hearing unverified chatter of a contagion outbreak in Tertium hive.
Several levels have been locked down without explanation and–
–troop dispersal, troop dispersal. Stand by for revised orders–
[static/distortion/fragments of other voice transmissions]
–Mourningstar, are you there?
I need you to acknowledge my signal.
It has been twelve weeks since your last transmission.
I can only hope you are en route.
The hive authorities refuse to confirm a plague outbreak, but local citizens have told me stories of affliction in neighbouring zones.
I have–
–orders received. Disembarking as per instruct.
Reassigned troop awaiting transport to Area 19–
[static/distortion]
I visited a nearby zone, where I found an aid station and spoke to a medic.
She was too afraid of censure to verify specifics, but she told me that the plague does not respond to standard curative treatments.
I fear, therefore, the malady may have some component of the Warp, and thus it is vital–
[static/transmission terminates]
IV
[static/distortion]
–Mourningstar, this is Wyrmwood.
The plague is growing worse.
I can confirm six zones now locked down.
The mood here is ugly.
People are afraid–
–release clamps, aye.
Redirect troop transport nine-niner to low orbit approach–
–I repeat, the hive authorities have now officially confirmed an outbreak of pestilence.
Precaution measures have been issued.
Units of the Moebian Sixth Astra Militarum scheduled for frontline deployment have been reassigned to assist with quarantine control in the hive–
–drop two, respond. Drop two, what is your status? Drop five, advance to–
–ask myself how bad must it be if frontline units have been
reassigned?
The Fringe War is Atoma’s primary concern,
and yet they retain troop elements to handle the crisis?
Mourningstar, I beg you acknowledge.
How long until your arrival? We–
[static/transmission terminates]
V
[static/distortion]
–Mourningstar, this is Wyrmwood.
Immediate response requested.
Situation critical.
Acknowledge via Secure Vox Encrypt Delta Four, as soon as–
–target destroyed. Advancing to transit sub-access–
[eerie chanting]
–seen evidence of it with my own eyes.
This plague, this pox… it is the work of Chaos.
It deforms and ruins those infected in the most hideous ways, and provokes manic behaviour and demented raving that is–
–kill confirmed! Kill confirmed! Target is ablaze–
[eerie chanting]
–Mourningstar, in the name of the Emperor, please.
The daemons of decay will kill this hive unless you–
[static/transmission terminates]
VI
[static/distortion]
–This is Wyrmwood.
Status Red emergency.
Tertium hive is under direct assault.
I have taken shelter in a neighbouring zone because–
–Drop seven, orders confirmed. Kill them all–
[eerie chanting]
–I say again, the Astra Militarum assets assigned to assist the
crisis situation have turned on us.
They are attacking the hive.
I repeat, the Moebian Sixth, that most loyal and celebrated regiment, has turned!
Throne save us! They are attacking the hive
and intend to kill us all.
[static]
–I have seen the bodies of the dead in the streets.
Hundreds! I have seen transit stations on fire.
They have secured beachheads and are advancing
We have no means to resist.
Mourningstar, I beseech you, for the love of God-Emperor who protects us all. Answer me–
[Transmission Terminates]
VII
[static/distortion]
–This is Wyrmwood.
I am doing all I can to maintain broadcasts.
The plague is spreading, and we are confined to our zones.
But the Traitor Guard are advancing.
They are killing and looting, and jamming transmissions–
[eerie voice]
[static]
–Wyrmwood, resuming.
My signal was shut off.
I have switched to Secure Vox Encrypt Epsilon Eight.
Mourningstar, the Traitor Guard are everywhere.
Hive defenses are no use because we let them in
We are attacked–
[eerie voice]
–I remain convinced that the Guard units have brought this heresy with them.
They are the carriers.
They have brought it back with them from
the frontline of the Fringe War.
Something they encountered out there on the feral frontier, some ancient madness that now dwells within them, and infects anything and anyone who–
[transmission terminates]
Tertium Vox Intercepts
I
(Had to do this one myself so it’s not 100% official)
This is Mourningstar to strike team Magnus 12. Do you receive? Yeah I repeat this is… this is Mourningstar to strike team Magnus 12.
It’s no good sire, the heretics are disrupting all vox relays.
All of them? Blast your eyes! That’s impossible.
I know sire, but it’s happening anyway. Wait, wait. I’ve got something. It’s very weak.
[garbled] We need immediate backup!
Sergeant Canva, is that you? Switch to secure channel delta corvus 691. Sergeant, do you read me?
[sounds of sergeant having a bad time]
Canva? Answer me damn you.
[transmission cuts]
Emperor have mercy, she’s gone. The whole squad’s gone.
How dare… No, ignore me. I am a foolish old man. We can’t keep sending auric-class operatives into Throneside. The district’s swarming with heretics. But we need the Archivum’s commsplex. Grendyl must know about this.
And about the traitor, sire?
Hold your tongue if you want to keep it. Silence is the highest service.
Yes sire, sorry sire.
I wanted to do this cleanly— the traditional, honourable way. But keep that Armageddon feral hog away from things that don’t concern him into the bargain. Damn those heretics! Very well. Tell Morrow that he’s clear to proceed. Tell him to send in the rejects.
