If you recorded your video in the Story Studio, it will be saved to a USB flash drive.
Plug your USB flash drive into your computer. If your computer does not have a USB-A port, you can use one of the media editing stations outside the recording studio to access your file.
Your video recording will be inside a folder named "Story-Studio-YYYYMMDD-ID" where YYYYMMDD is the date and the ID is a unique identifier.
Inside the folder you will see several files. The one you will need is the .mp4 file. MP4 is a common video file format compatible with lots of different technologies. Here is an example of what the contents of the folder will look like: