
Therefore, such files don't get much, if any, smaller when they are added to a Zip file (.zip or. Files that are compressed, as these examples are, usually cannot be compressed more to any significant extent. Examples include, but are not limited to, graphic (picture) files (GIF, JPG, PNG, etc), music files (MP3, WMA, etc), and movie files (AVI, MPG, etc). These file types usually employ efficient techniques to compress the data they contain. For example, most multimedia files will not compress much, as they already exist in a highly compressed state. There also are other types of files that often will not compress well. There are some other types of files, such as program files, that may compress by 50% or so.

Certain data files, such as text files, picture files in the BMP format, and some text style database files can often be compressed by 90% or more. Some types of files compress better than others.

The screenshot below shows the original file size of the video which is 3.38 GB (1) - far too big to upload as your assignment. In iMovie 10 Apple removed the capability to alter the video compression settings using Quicktime but you can still reduce the file size to ensure it is under 500 MB.

Step 3. Look at the options for changing the Resolution and Quality of your movie Share your movie using the 'File' optionĬlick on the 'Share' icon (1) and you will see a window with a number of export pre-set options. For help with editing your video in iMovie see

Edit your movie in iMovie as usual - when you are happy with the finished movie and ready to export move on to step 2.
