Exporting and saving a video in Clipchamp - Microsoft Support
: You can save a draft to your phone gallery without posting it publicly. Open the draft, tap "Next," and ensure the "Save to device" option is enabled. You can also set the visibility to "Only you" and post it to download it privately. Download vid 480p mp4
If you need to download existing online videos specifically in 480p resolution, several tools and methods are available: Exporting and saving a video in Clipchamp -