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I actually think you should be the one to prove me wrong here. I made a statement against each of the video's you linked.
I dont know which addon those guys used back in 2008.

But the fact that...

His health gets updated every time 1% of his health goes down. Again, its an addon calculating his remaining health based on the percentage of health the server sent to the client. You can see this...

Again with this thread

http://forum.warmane.com/showthread.php?t=351643&p=2796607&viewfull=1#post2796607
Heres all the proof you need.