You're getting charged for using purchased assets (images or/and video clips) in your project.
Wave.video stock media library contains free and purchased assets. Purchased (or premium) assets are high quality and royalty-free footage and images coming directly from leading stock footage providers. Users have to purchase these assets to be able to use them in projects.
If I purchase a premium stock asset for a video, am I able to reuse it in other videos?
Pro and Agency subscribers only have to pay for a premium video clip or an image once. After that, they can reuse this purchased asset in their projects an unlimited number of times.
Creator plan subscribers can purchase premium stock assets for a one-time use only. If they want to reuse the same asset in several videos, they'll need to pay for it again.