M4V Mimetype - video/mp4 or video/m4v??

I am serving a video via the HTML5 video element. I'm finding conflicting information about the appropriate MIME typ...

What MIME type should I use for CSV??

I've seen application/csv used and also text/csv. Is there a difference? Does it matter which as long as the reques...

Error: Resource interpreted as Document but transferred with MIME type application/pdf?

I am sending a PDF stream from my server to the client and then displaying that PDF in an <object> tag in the ...

Getting mime type from file name in php?

I have the following function to produce the mime type from a file name: function get_mime_type($file) { ...