there is a program i used called dvdfab7 ... works like a charm
Does this work on mac os?
Just to confirm I have many films/movies which are 720p on my external drive and would like to watch them at 720p on my iphone 4. so will this help me?
My suggestion is to get Handbrake and use that to convert the video files to one that the iPhone supports. I would recommend the AppleTV legacy setting to get better picture quality for your files.
You then simply sync via iTunes and you're good to go.