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The reason this has grown is because it's storing project info, not because it's storing the video again. You should note that while your iMovie Documents & Data have grown a little, it will not have grown by anywhere near the size of the actual video itself.This message will give you the size of the video. You should get a warning saying that this attachment may be too large to email.Go to your Camera roll and try to email this video to yourself.Now go to your actual iMovie app and take a 30s video.Take a note of how much space is used up by Documents & Data.Tap on iMovie (likely to be in your top 10).Wait for the list of apps to appear (this may take a while if you have lots of apps).In the Storage section, tap on Manage Storage.Go to Settings > General > Storage & iCloud usage.If you like, you can actually prove this to yourself by doing a simple test: Once you have totally finished a project, you can export/share/save the final version and after that you can delete the video you took from your camera roll (if you want). That's why you get the error you're getting after deleting the files - because that's where iMovie is trying to access the video from.īasically, what happens is the video is saved to your camera roll, but project specific info is saved within iMovie. While iMovie is saving videos to your camera roll, this isn't using any extra space on your iPhone. In a sense the basis of your question is in error.
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