You’ll see why this is part 1 of The Grand Washington Hotel at the end of the video… there’s a bit of a bug!
But this is the first main mission in the Open Beta, and unfortunately, bug or not, you have to complete it before the game will let you discover or play anything in the open world properly. It’s kind of like a tutorial level, so you’ll have to come back in another episode to see the conclusion of this mission. Sorry.