If you ever need to combine two or more video clips into one new video, here are some free tools that may be helpful:
The built-in Windows "Photos" application offers functions for importing, trimming, and saving combined videos, but is also a full-featured video editor (similar to "iMovie").
Apple's venerable QuickTime application is built into MacOS, and has supported importing and combining videos for years.
Apple's iMovie application is a full-featured, free video editor for MacOS and iOS.
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