A nicely packaged folder containing everything used to create your video project.
This will include all videos, images, reference files, music files, licenses, etc... Additionally, this will include project files for Adobe Premiere Pro and Adobe After Effects where your content was editing and motion graphics were designed and animated.
While not always needed having your project archived like this will allow you to bring your video project back online in the future for further iteration, editing, or adjustments.
An Adobe Creative Cloud license, and copies of any plug-ins used will be needed to open these project folders up in the future.