Long videos make editor unusable

Any video that is longer than 5-10 minutes the video editor buffering time makes the editor unusable in practice.

This is due to a variety of reasons:
- If you try to cut the video and it hasn't finished buffering that Roughcut the slider used to cut the video will collapse.
- You are unable to "Save and Publish" the videos until all the Roughcuts have finished buffering (it will timeout after 60 seconds). This is really peculiar because the mix is saved as XML which should be able to be created at any time. It seems like it is just incorrect programming logic.
- There should be logic that determines which videos are being buffered in the timeline so that if "Video A" is in the timeline and then it is added to the timeline again it does not re-buffer.

There are several resolutions that could resolve these issues.
- Update the cut operation so that a video is allowed to be cut without worrying about the buffering of the roughcut.
- Refactor the KAE so that is using either streaming or uses the server-side progressive video seek hack (like youtube) rather than the current progressive download.
- Add logic to check video ids in the timeline and whenever a video is added determine if its video id matches one in the timeline then to use the buffer of that video in the timeline.