How easy is it to get a video out of your history cache?

[True Alpha-Male]

Basically I have videos that I need to protect (only allow specific people to view it once).
*This is for business purposes and intellectual property.

I had a system designed in php that automatically re-directs a webpage after an embedded video finishes, changing the name of the video page at the same time (so they can't go back).


This system doesn't work though if people can just dig it out of their cache.
*I have no experience doing this but I have heard it can be done.


Thanks.

[Jim]

It's simple. But, few people know how to do it.