iPhoto Play a video clip
If you imported a video clip that you shot using a digital still camera, you can watch the clip in iPhoto.
To play a video clip:
Do one of the following:
Double-click the video clip.
Select the clip and press the Space bar.
Use the controls to play and pause your video clip, fine-tune the sound, and more.
You can drag the controls to place them wherever you want on your screen.