Q: I have a problem with your EasyHTMLVideo app. iPhone still doesn't play a video generated with your software - where as Android, Safari, Firefox play it.
What can be the reason of problem?

A: Possibly, you have incorrect settings on your server.
Apple iPhone uses HTTP byte-ranges for requesting audio and video files. First, the Safari Web Browser requests the content, and if it's an audio or video file it opens it's media player. The media player then requests the first 2 bytes of the content, to ensure that the Webserver supports byte-range requests. Then, if it supports them, the iPhone's media player requests the rest of the content by byte-ranges and plays it.
Make sure that your server send byte-range requests.