I'm currently having a conversation with jfareal, the creator of this:
We're talking about a PhysX problem in the new WarZ Patch which requires us to update to a new version, which is not downloadable yet, we will find a way around this, but this may take some time.
The forums will be back up in short time, my partner is parallel working on the server and the security system.
With the update I won't continue WarZED anymore, instead ZEDframework WarZ, which already has a much much better performance, more features, security and stability. Don't expect another leech, and if yes, blame it on my partner
Even if there comes a new leech, I'd easily be able to make it completely useless :P
EDIT: to answer the questions: no you can neither buy this hack in the video, nor download it for free, it's a completely private version.