Obfuscating with Javascript won't prevent people from doing that. There isn't a real way to prevent people from doing that as, by design, in order for the video to play, it has to be downloaded to the browser. If it's downloaded to the browser, the link is exposed and someone could embed it. I sell an Enhanced Video mod that prevents your video links from showing up in the "View Source" menu, but it doesn't stop someone from actually being able to embed the video if they know the URL to the file. Without using a streaming server, the best thing that can be done is to use something like my enhanced video security mod along with an IP file locking feature. This would prevent people from linking your videos outside of your site, but it would not stop people from being able to download the videos to their hard drive. But, if all you are concerned about is people linking, it would prevent that. To do something like that, however, you would need to be either running your own server or using a VPS. You wouldn't be able to do more than just the enhanced video security stuff on shared hosting.