Is possible makes a upscaling with eedi3 + nnedi3?

The answer to your question is because **edi is first and foremost a deinterlacer in the form of a field interpolator, with a special flag called "dh" that doubles the height of the input by stacking every individual field from the original data above/below an interpolated field. The turnleft/edi/turnright is just a workaround for this principle, since rotating the data by 90 degrees means that "height" data is technically the actual "width" data - and so doubling the resolution of this after doubling the height followed by a reverse rotation effectively results in a doubling of both the vertical and horizontal resolution. (Since doubling the height of the rotated data means doubling the width of the original data.) nnedi_rpow2() does the same thing, except it does so behind the hood instead of showing you all the nice hacky details.

Bloax, I will write some values of some eedi3 parameters, then you tell me if it is correct or not, ok? For upscaling: field=1, dh=true For deinterlacing: field=3; dh=false For antialiasing (No interlaced video): field=1, dh=false

That's right, and for best effect you blend together the results of nnedi3(field=1, dh=false) and nnedi3(field=0, dh=false). at least if field=0 is interpolating the field that is left intact when using field=1

This blend is for deinterlacing, isn't? How I blend the results? For antialiasing and or upscaling, there's some blend that makes optimum results? which?

The blending is for antialiasing, since doing so results in every field getting interpolated to some degree.

Instead makes a eedi3 + nnedi3 upscaling, what do you think about make a PointResize upscaling + (eedi3 + nnedi3 antialiasing)? It is a good choice over make eedi3 + nnedi3 upscaling?

Judging by how nnedi works - which is looking at chunks (eg. 32x5) of data - and interpolating based on edge flow, and how point resizing would not only literally halve (or worse) the resolution of these chunks, but also introduce a whole bunch of false square edges, no - that wouldn't be a very good idea.