I am trying to set some in and out points on a video clip, so I move it to the trimmer, select the region I want then move it up to my video. Then I try and loop that section, but when I drag the length of the video, it readds what I have trimmed off. How do I trim off part of a video clip, then have it behave as if it is a new clip, so if I increase the size of the clip it will loop based on my trims?