Force Stream of files

Hi.

When i click on a (mp3/mp4/avi) link on my personal IIS8 server - it downloads the file.

Is there a way to force these files to "play" instead of downloading ?

Ive not altered the default directory - C:\inetpub\wwwroot

(I dont want 2, 3, 4, 5+ copies of files ive already got - saved in my download directory ...)

Ps ive tried adding .htaccess file - but i dont think the server uses this as nothing happens. (the .htaccess file is viewable / seen on my browser wen i list the files)

EDIT:

http://www.iis.net/learn/media/live-smooth-streaming/getting-started-with-iis-live-smooth-streaming#install

I do not have the "media services" or "live stream" options in my IIS management screen.