"Almost miraculously, any change to the first photon will be mirrored in the second. Just how that change propagates across space and time is not understood. It's also thought that whatever it is that lets entangled photons share information may take place faster than the speed of light."
That kind of explanation puts the explainer firmly in a "General Relativity" universe, where little things are tracing their wobbly spaghetti paths through spacetime and things only happen if other little things are exchanged (there must be "interaction"). In QM, the "state" of the "duplicated photon" is one (mathematical) thing not at all visible "in reality" and extracting a bit of information about that thing changes it - so that you know more about the next bit of information that you may extract from it.
Indeed, that changing of the thing "may" (indeed, does) not only take place "faster than the speed of light" (at the speed of thought, so to say) but across time, too (Quantum Weirdness Now a Matter of Time).
Einstein himself described this as "spooky action at a distance (“pukhafte Fernwirkung").
That's "spukhafte Fernwirking" (like in "spook", ghostly). Einstein was never happy with QM and desperatly wanted "action". There ain't no such thing.