The mantra is simple

Congrats to all, but furthermore thanks to my idea: "play fast" that I repeated often in my video.
In a game with 3 minutes without increments some elements are the keys of victory:

1. Opening knowledge
2. Place and stay in the right square without long maneuvers
3. Take a look for the time playing to sacrifice, eventually, in the endgame your piece for a time advantage.

And so, with my skepticism I ended the tournament in the fifth position.

This is the video of this Hivechess tournament, congrats to all and thank to @stayoutoftherz for the organization.