I'd say mostly the videos will still be relevant. I haven't dipped my toes back into Coil recently (I played 1-5 a lot when it was new, but not much else), but mos tof the things will be the same, just more lenient. Turn 1 is almost certainly different since the attack up stacks won't destroy you, so people do that in a more streamlined simple manner. T2 has been a joke since people figured out the enrage strat, T4 I'd imagine plays out about the same but now with downtime between phases that was more or less absent before. T5 has to be done in pretty much exactly the same manner, though death sentence is less of one.