I took a ~23 minute video with my Air 3 and it was stored as 5 files.
How do I merge those files into one long file and what program should I use?
Thank you in advance.

Hi there. Thank you for reaching out. You may check different third-party editing software like PR, MediaEditor, DaVinci, etc to merge the videos into one single file. If you want to edit short videos, you may also check out the Lightcut app as it features a one-tap editing function, exclusive video templates, and many other resources. To download the app on your device, please click the link below. We appreciate your valued support.

https://www.dji.com/downloads/djiapp/lightcut