Hasn't the supposed weirdness of the delayed choice quantum eraser experiment been debunked? Can someone in the field please confirm? I find contradictory videos on YouTube.
Depends on what you mean by "weirdness". Whether you see interference really does depend on which axis you choose to measure along, but it's not because you're sending signals backwards in time. The electron was in a superposition of interfering and not interfering all along: the delayed choice is just choosing which component of that superposed state you want to measure.