If you captured some video clips with your iPhone, iPad or iPod devices and now you want to access and watch them in the Videos app in your device, you may have noticed that the Videos app won't list your recorded videos. Rather, the video clips will be saved to the Camera Roll or Photo Library in your device. However, there's a way to transfer video files from Camera Roll to the Videos app.
You will need: (1) firstly transfer the videos from iPhone or iPad to your computer with Wireless Transfer App; (2) then sync them back through iTunes.
To tansfer video clips from your iOS device to your computer, you can use Wireless Transfer App. For a step by step guide, see see: How to transfer videos from iPod touch to Mac with Wireless Transfer App