How to embed videos securely ?

hello. i am new to web-development, and am using jsp to build a website.
i want to embed a video player in my site, just like you-tube does...except that i dont want others to download the stuff (using any software or so on..)
i have seen various non-free websites, (mostly porn), that dont allow me to download the embedded videos..even if i try some of the renowned websites (where we simply put desired URL and the video is downloaded), and even some polular softwares, these sites dont allow a video download.
i want to know, how these paid sites secure their videos...hope to get some help.

Not quite. They simply don’t give you a download link. You can still rip the stream.

You want to secure a video? Don’t display it on the internet. The video must be sent over the internet from one computer to another, and that means it gets downloaded. You cannot say, I want a remote computer to show my video without actually having the video. Not possible.

yes i realize your point, even i use to download those videos and copy them from the /tmp location.
by secure, i mean the way to avoid downloads through the famous downloaders (like youtube downloader and all..); as i said earlier, if i give the url of a video in a paid site. the softwares give me an error like "no video found on this page"