How to untrim a video I accidentally trimmed on my iPhone 4s?

How can I untrim a video I accidentally trimmed on my iPhone 4s?

You can't un-trim the video. If you have a backup on iCloud or another device, your best bet is to recover it from there. If it is Really important there are services that can recover the lost video.

You can try this software http://www.wondershare.com/disk-utility/recover-deleted-video-from-iphone.html
Please note that when you delete something it just flags it that the data can be written over. I would not use the phone until you try this software out or use a recovery services.

Trim means gone

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