Here's what student Rick Dieterle kindly wrote, to enable you to add more than one piece of music to a CC film:


 In my video editing screen, I put the first song I want at the beginning of the video, then I click "Save".


 From my Video Manager, I open the same video in the video editor (by clicking edit next to the video) and take note of the time the first song ends. Let's say the first song ends at 3:35.


 I then choose a second song and add it to the video. This will replace the first one, but that's OK, read on.


 Using the positioning tool, I start the second song one second after the first song ended, so in this case, 3:36.


 I then click "
  Save
 ".



  NOTE: NOT "save as"!


 You can do this as many times as needed to get music playing through the entire length of your video. The important thing is to keep track of when the previous song ends in the video and make sure the next song starts 1 second after that time in your copy.


 I can then go in to monetize, add my description and tags.


 I hope this helps anyone having trouble adding multiple songs to a single video.




   Note: the first track may take some time to process - always wait until this is complete before adding the next and subsequent tracks, please.