Streaming video files If you need a real level of protection, you need to use a real stream server. The big advantage here is that the file does not actually download to the user's computer - it is only considered as a stream in real time, and there is no file on the user's hard drive.
Streaming video provides pretty good protection. This will stop most random thieves from the dead - only those who are determined and with a little technical understanding will continue to try to steal the video.
The most common way to steal streaming video is to use a video capture tool. This is an application that captures a video stream and saves it as a file. This type of theft is extremely difficult to protect. Although some protective measures may exist, for example, by denying access to known capture utilities, this level of protection begins to lose. A thief who has devoted himself enough to using the stream capture utility is probably designed to do his best to get the video.
Even if the thief cannot capture the stream directly, he can always use the screen capture utility. This is an application that displays everything that is displayed on the screen. They can define a specific area or window (i.e. a video screen), play a video and inform the utility about it. There really is little that can be done to combat this, but even if you could ...
Anyone can configure the camcorder and point it to a computer monitor. Anyone with a few clues can remove the flicker and get a reasonable result. You absolutely cannot stop them from doing this. Although this is a very unusual way to steal a video, it is a good illustration that thieves always have one more option than a webmaster.