How to detect a redirected URL?

Question

I\'m working on an app that takes URLs from RSS feeds and opens them in a video player. It works if the URL is directly to the mp4/whatever file, but if I have a redirected URL

Answer 1

I made a test for you with my firefox10:
I typed your non-redirected url in my browser, and it will show the download page very soon, but for the redirected url, I aslo have to wait for a while to see the download page(more than 10s). So I guess accessing redirected url is much slower than the non-redirected one.