  The Mirror Worlds are a mechanism of the Wheel. And are variations based on factors, data, which is part of the Wheel. Mirror Worlds are the mechanism the Wheel uses to balance itself. How else would it know when to insert Heroes, when to be more actively involved.  Now you are suggesting, I presume, that it was simply something created out of data, but it is data pieced together in such a way as to appear as a video of sorts, but the distinction is very implausible (or an unnecessary distinction as the information would have come from the Mirror World tool at the Wheel's disposal), unless it was a device created by the Wheel. If the columns were created by the Wheel, I'd agree that it could be a video like device of data splicing. However, as it is a Ter'angreal made by Aes Sedai and they could somehow program their device to hack the Wheel's data in such a way, makes them essentially equal with the Creator.  Now, you could say PLE, but that would get you many ugly stares, in essence that the Wheel directly tampered with the Ter'angreal and fed it data (gleaned from it's MW tool).  No, my position is that the ter'angreal is getting its information from what I (for want of a better term) have called genetic memory; the thing that makes Mat and Perrin start speaking the Old Tongue randomly in TEOTW. I'm assuming the ter'angreal functions in such a way as to extrapolate this data from the DNA of the Aiel who enter it, and my evidence for this is both the fact that it only shows the lives of ancestors, and the fact that it discriminates genetically:  Someone who wasn't Aiel could wander through those spires forever and never see a thing except the spires. He or she might think it was a monument, or maybe a work of art.  