1. kamcord
https://github.com/kamcord/
2. Sound Stage & iSimulate
http://blog.tacograveyard.com/recording-ios-gameplay-trailers
http://www.cocos2d-iphone.org/forums/topic/how-to-capture-gameplay-video/
3. Twitch
Twitch Mobile SDK
4. everyplay
https://developers.everyplay.com/