Time limits of Audiojungle licenses?

Hi! Could someone explain, what are time limits (if any) for Audiojungle licenses. One year? Or forever? Does buyer need to renew his/her license after one year of usage, or not?

Here’s my understanding: for a single use (1 youtube video) there is no time limit . The time limit of 1 year only arises when a track is used in a series eg. As the theme song for a youtube channel. In this case a user should buy a new licence every year (if the show is weekly) or every 52 episodes if the show is more regular.