For the video guides, use THIS THREAD.
These look like small laptop computers and highlighted in a light blue color when you're close. Unlike dog tags and legendary weapons, any player who activates one of these during a co-op campaign will save it for everyone playing. Again, you can check progress the same as legendary weapons, except you press again to see the audio logs. There are 12 audio logs located in the following levels:
Level 1- 1 total (Request for Re-assignment)
Level 2- 2 total (RE: Request for Re-assignment & RE: RE: Request for Re-assignment)
Level 4- 1 total (Please Mom...)
Level 6- 3 total (Supply Requisition Order, Origin Construction Status Report, Evacuation Notice)
Level 7- 3 total (Xenomorph Lifecycle Notes, Hale Autopsy Report, Security Concerns)
Level 8- 2 total (Queen Progress Report, Origin Status Update)