The shop page shown in the tweet is from the Dutch branch of a multinational retailer from Germany, but the other national branches of the same company do not even list next-gen versions of GTA V, let alone at €75. On top of that, I can only find one other retailer where it's priced at €75 (also Dutch), and a third where it's €70 (Dutch yet again). I can't find any other shops in or outside of the Netherlands that even mention a price for next-gen GTA V, nor any other mention of prices for the game outside of the tweet and the video in the OP that discusses it.
I'm not saying the game won't be $75, and there may be other sources I've missed, but I'm going to need more than the three Dutch web shops, one random twitterer and one youtuber I did find to be convinced this is true.