Except that this is the real world we're talking about, where movies can be and are heavily altered in post-production. The Titans' locations were clearly moved around, which is why these (barely even visible in the movie) monitor images aren't to be taken as gospel. The text and images are near-impossible to make out in the finished film, and the full res versions should not be treated as canon. It took a full year after the film had wrapped for the first trailer to even come out.
As for the set visit video, you do realize that videos can be released at any time after they've been recorded, right? These news outlets were invited on-set back in August of 2017, and they were evidently not allowed to release footage until after the movie had been completed and released.