As I stated, video is not always compressed using the highest settigns for various reasons of quality/speed. Therefor it is prudent to at least TRY to compress the video first. Once the RAR ( or zip etc) compression has been performed, there is no reason not to use the smaller of the compressed or uncompressed versions. 2% may not seem like much, but its enough to save on the upload time which is realyl what most distributers are worried about.