Hi Eric,
Now the movie should be playing ok.
BTW, you can download it here :
UE4-headaches.flv
or here
UE4-headaches.avi (allow a few mn for ftp transfert because it's a bigger file)
I deleted the cache again. Absolutely no changes ! Same error then before uninstalling and doing all the stuff. Only No more Javascript error. Still a warning sign immediatly in the server behavior tab and unable to get the extension working correctly...
PS : Did you have a look at the souce code attached in first thread ? Did you notice something ?