body: I know this isn't a law site. I am not looking for law advice or how to get around the law. I just don't understand the licensing around mp3/4 (and yes I know these are different).
  
  
  Our use case:
  
  
  * very big corporation
  * creating demos/videos/Captivates/Articulates for helping clients out
  * all of the tools that we use to create is licensed and we are paying for it per license agreements
  * we are mainly concerned about the mp3/audio segment. We currently do not offer audio directly but the audio files help create the video (think Camtasia and similar things) or are used in Captivate/Articulate.
  
  
  So where I am confused is do how-to videos (non-revenue generating) need licensing support? Then if we are already using a tool to create the audio/video isn't the fact that they are supporting mp3 and allowing output already conforming to the licensing? 
  
  
  And then if we do need licensing - how much? And what is the easiest way to assure that we don't need licensing given the how-to outputs we are creating? (we have talked about moving to .wav files but those are HUGE)
  
  
  
title: What are the legal requirements around mp3 or mp4 files?