Ummmm.....the second trailer is out....
...on one of the actor's Instagram page. WTF? I can't find it anywhere else so I'm assuming it hasn't been officially released. Link below.
https://www.instagram.com/p/BM9Ohz0gq7B/?taken-by=jovanadepo
It appears this all comes from the official Instagram site of the movie actually.
https://www.instagram.com/p/BM78TJThVOW/?taken-by=fencesmovie