このgiveawayオファーはすでに期限が切れています。Compress Video - Free the Spaceが今紹介されています。
Compress video to free the space for your device Now! It re-encode videos filmed on your device to smaller file size while keeping the same video quality. Also, it can compress videos in batch. After compressed, the output videos are saved in the private folder by default. It can be exported to Camera Roll manually.
Note: In order to protect your photos and videos, Apple does not allow 3rd party apps to delete contents in your Photos app. You have to delete the old videos manually.
iPhone, iPad, iPod touch