Compress Video clip with acceptable quality

I created a video tutorial to enable our clients to use our website.? The problem is the resulting file size of the video i too large and in order to compress it even down to 35MB I had to use a special codec.? I need someone knowledgable in video editing to resample the video at a lower resolution, and with a generic codec, so that any user can easily open the file and run it on Windows Media Player without the need to install any special codecs.[ [login to view URL]][1] Max file size limit is 10MB, would like it to be less than 5MB.