I would like to put the same background music in the 30 videos that make an online course.
It´s just one project / end product: the online course as a whole, that will be sold.
Which type of licence do I need?
Do I have to buy 30 licences, or one is enogh?
Your online course can be seen as a series, of which your videos would be “episodes”. The series policy allows you to use a single license for up to 52 episodes (or a year, whichever comes first). Of course the episodes must share a same topic or theme.
Hope it helps
Thanks a lot!
But this means I´ll have to buy the same license every year?
Only if you make more episodes after the one year mark from your first upload/publication. The license for the episodes made within one year remains valid forever.