I Like to Watch Achievement in Doom 3: BFG Edition
I Like to Watch15
Find all video logs in DOOM 3
How to unlock I Like to Watch
Video logs can be collected and then played within your own PDA. Good thing about these is that there are not many. Video logs are a lot easier to find than you would think and you will pick up most of them by natural playing, however one requires you to watch a TV screen all the way through.
Please visit THIS post for a spreadsheet of all collectables found in chronological order.