I'm new to Mac (I just got my Macbook a few weeks ago) and to the software. I've been taking videos and pictures with my new camera also. I use the software GIMP to compress my pictures files but I'm not sure how to compress video files. Can I use iMovie to compress the video files or do I have to download another program for that? If I do need to download another program, are there any out there for Mac that are easy to use and free?