Reusing music on Instagram video series

Hello everyone,

I was looking for a music track to use on a certain type of videos I create for an instagram page. I found what I wanted but still confused about the licensing.

From what I understood, music can be reused only on video series and otherwise I have to purchase the license for each video, but what I’m trying to know that if I’m going to use the music track on different videos but same topic on instagram (e.g. hair styling) would every video be considered as a product itself? or is it considered as a video series?

Thanks a lot.