Sometimes a video is too long, and what we need is only a few seconds. Using Filmage Editor to handle this problem.
1. Open a video file and drag it into the track;
2. Put mouse to the edges of the video in the Timeline Panel;
3. Pull left edge to where you want to start the video; then pull right edge to the end. Now the whole video become a video clip you need;
4. Move the clip to the left. Click Export or make other editing.