License management for a single opener used in multiple videos

Hello everyone,

I’ve created a video clip, using a music item from Envato Elements. This clip will be used as an opener by my client, in a series of 10 videos. Now, I wouldn’t want to be wrong: do I need to create as many licenses as my client will create videos (though the opener is always the same), or is the video clip I made considered as a single project, with a single license?

I’m a little in the dark, any clarification is welcome! Thanks a lot.