allow just my app to play videos with Html5 Video player

i have a cordova/phonegap app in which i added a HTML5 video player which play a mp4 from my server. <video width="320" height="240" controls> <source src="[login to view URL]" type="video/mp4"> </video> so problem is because peoples play my video link in theyr sites and apps so my server is down. how can i make this video just to play in my app is there a way to make html5 player to visit site via special user agent so in .htaccess on my server i can allow just that user agent and block other browsers and blank user agents for visiting sites so i need a solution how can i play video just from my app