//Get the object of the first video recording
record = [TXUGCRecord shareInstance];

//Start recording
[record startRecord];

//Pause recording and cache video segments
[record pauseRecord:^{
NSArray *videoPathList = record.partsManager.getVideoPathList;
//Write videoPathList locally
}];

//Get the object of the second video recording
record2 = [TXUGCRecord shareInstance];

//Preload local cache fragments
[record2.partsManager insertPart:videoPath atIndex:0];

//Start recording
[record2 startRecord];

//End recording. The SDK will synthesize the cached video clips and the currently recording video clips.
[record2 stopRecord];