Another effort to explain quantum entanglement in the following video: Quantum Entanglement and the Great Bohr-Einstein Debate.
This is also in response to https://safenetforum.org/t/network-performance-concerns/10299/58.
As I understand it now: quantum entanglement can be used for secure key generation, but not for information transport faster then light. Because there is no control over which entangled info (polarisation or spin e.g. used for the crypto key) will be measured. There is only the knowledge that the other side will get the same 'key' with a similar measurement. More info concerning this: see part 09:35-10:23 of the linked movie.