Resource:Bink Video

Bink Video is a proprietary file format for video developed by Epic Games Tools, formerly RAD Game Tools, a part of Epic Games. The video file extensions .bik and .bk2 are used in Fallout 3, Fallout: New Vegas, Fallout 4, and Fallout 76.

Download
To create custom videos with audio, you can download the tools here: under RAD Video Tools.

Information
To get started, you need a video clip converted to H.264 (Native), typically a .mp4 codec will work with the audio track being rendered out separately. You can use a program like audacity to separate the audio and video tracks, but you’ll need the audio set to 44100 Hz, 192 kbps, Stereo.

Steps
Users will want to download and run their Rad Video tools and open up

Then hit Mix and Done. Your .bik file should now work with audio. Lastly, after exporting, rename the file extension .bk2 if you’d like to get it working with Fallout 4 or Fallout 76.