Hi @Mutazhafez!
If your videos are all published on the same channel, they would be covered under one licence as a series (see the licence FAQ here).
What constitutes a series (eg TV series, webisodes, or a magazine with monthly editions)?
To be considered a series, all things in the series (eg episode, edition) must be connected, and be released within 1 year of the first installment. There is also a maximum of 52 episodes or editions within the series.
Example: A 12 episode TV series that starts in December and ends in July would only require a single license. A YouTube series that releases an episode every week (52 total) would only need to purchase a license once every year. A magazine that releases an edition every other month would need to purchase a license once every year.
It sounds like you’re creating a single “end credits” piece that will be added to the end of each video in your series. If you are purchasing items from VideoHive and AudioJungle, a single Standard Licence for each item should be fine.
If you need to keep the same video conclusion for more than 1 year (or more than 52 episodes in a single year), you’ll need to purchase a new Standard Licence after that.