The above follows a pattern from previous seasons. The 1st trailer was always removed shortly before the main one dropped. I’m thinking the same thing will happen here.
Editing in some more of my reasoning. If you scroll down the playlist you’ll see that the first trailer for Season 6 (with “Wicked Game” as the song) is also missing. The same is true for the first Season 5 trailer. I’m presuming it’s a tactic they use to prevent confusion when people search for the new one? Either way, there’s a pattern here and I’m pretty sure it’s about to repeat itself.