Adding an Introductory Video
Overview
In this tutorial you will learn how to convert a video into the required .BIK format and to be played in game.
Record your video
To record your video you will need a video recording tool such as FRAPS , OBS Studio or the built in Source Recorder (Most recommended as it makes the best quality and almost no slowdown).
If you want to add the TV tuned music from the Valve video files You can find three TV tuned sound files in Steam\steamapps\username\team fortress 2\tf\sound\ui.
Converting the file
TF2 will only play .BIK (Bink) files. You will need to use RAD video tools to convert the video, you can get the RAD Video Tools here.
Embedding the .BIK
Once you have converted the file, place the .BIK video into Steam\steamapps\username\team fortress 2\tf\media. Make sure you name your video file the same name as your map, so the engine knows what map the video belongs to. For example if it was for cp_dustbowl
the video would be named cp_dustbowl.BIK
Testing
Now when you launch the map, it will have a Watch Movie option for you to watch your video.