Unable to upload large videos

Hi guys,
I have a problem that I need to solve and maybe somebody has deal with it before.
I need to be able to upload large video files (around 500MB). I'm able to upload files of 68MB, but when I test it with the 164MB and 175MB it just get stuck. Chrome goes up to 20% and then starts again from 0%. After the second time it just doesn't do anything.
I've already checked php.ini and httpd.conf. The limit is set to 1024MB.
So, any idea of what may be going on?

Thanks.