A rogue can take his bonus action to dash, monk using Ki and wizard, sorcerer, warlock using the spell Expeditious retreat. Yes, the presentation from today shown Dash as an action.
But everything else in regards to D&D 5e is true. I don't get the confusion.
It's just that your scenario is decidedly impossible for most classes; no confusion. You said:
Exemple, you can move 9 meters in a turn, you may move 3 meters to reach a creature, use your action to do an attack, you kill that creature, then you move toward another creature with your remaining 6 meters but that's not enough, then you use your bonus action to dash to reach the next creature, you use your action surge feature to get a second action on this turn and use that said second action to do an attack.
Only rogues and monks would actually be able to do this. Fighters (the class you're describing here), have no ability to dash as a bonus action, therefore the scenario described here is impossible.
