So if you intend to play the movie from iMovie, the first thing you need to do export the right file format to MP4 acceptable with Kindle Fire. In order to have the optimal playback on Kindle Fire, you would better choose the resolution at 1280*720 or 720p.

Then the problem happened that Kindle Fire can recognize your MPEG4 file from iMovie. How to tackle with it? The easy solution is available: convert iMovie to Kindle Fire MP4 with Kindle Fire Video Converter for Mac. It can transcode iMovie DV,MOV or MPEG4 file to MP4 for better support with Kindle Fire. Meanwhile, it is very easy-to-use and several mouse clicks are enough to finish all the job.

Have to mention, supposed that you also try to play video or music on iTunes library on Kindle Fire, the Mac Video Converter for Kindle Fire can also help you a lot, for it can also convert iTunes video to Kindle Fire or listen to iTunes music on Kindle Fire as well.

Now, Let's take a look at how to export iMovie to Kindle Fire:

1: Export video from iMovie 09 in HD-720p

2. Download and install the doremisoft Kindle Fire Video Converter for Mac (Lion OS included)

3. Add videos from your PC Hard Drive after you copying your iMovie to Mac.

4. Set best output format for Kindle Fire Mp4.
Kindle Fire can also support H.263 (.3gp, .mp4), H264 AVC (.3gp, .mp4), MPEG 4 SP/ASP (.3gp), VP8 (.webm)

Tip: setting 720p resolution is best for Kindle Fire 1024*600 display.

5. Click START button to begin convert iMovie to Kindle Fire Mp4. You can define the video save destination to the way you best like by resetting output option.