How force download mp4 file

@omid_student,

There is a lot of things to trouble shoot.  What kind of connection does your user have?  Are there any download limitations from your hosting company?  How big are the videos?

Thanks
Files are about 20 mb
My users are two user now
When i redirect to video,speed is good

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Here are a few different ways of doing it:

Force download MP4 file – PHP or .htaccess

Thank you
Do you can say why speed is low when i try send mp4 to header?