There is an easy way to combine two quicktime videos. Just have a try RZ Video Converter which goes on well on my computer, it can combine videos easily, and it also can convert any videos or audios between different formats. Easy to run rz video converter, drag your quicktime videos into it, select them, then choose "merge" button, then press "start" button, you get one video which you want to. Yahoo or google search and download it. Hope it can help you.