Thanks to iOS 8 API. This tweak allows you to pause/resume video recording in stock camera app. For usage, tap on elapsed time to toggle pause/resume video recording. (see screenshot)
Note: You might experience "stutter bug" after resume recording when choose framerate >= 60. This is probably because of camera format itself.
Options for RecordPause can be configured from the Settings menu. You can download the tweak from the Big Boss Cydia Repository.