Cool design. - I know not one word of spanish, but what I can make out from the video is that you sculpted and then retopologized the model. I´m new to Blender, but that´s exactly what I was thinking would be an awesome workflow for any product design. It let´s you freely think and and experiment with form while designing and then quite easily fix it into a clean mesh. - Actually you can take this even further by exporting the polygon base mesh without subdivision to a software, that supports T-Splines and convert everything to solids / nurbs that way. Like that you can take it quite easily from sculpt to production. - Definitely something I am going to try. Thanks for sharing.
Here is a video showing how to take a polymodel to nurbs using Blender and Fusion360, which might be of interest to you, if you haven´t seen it already?