The argentine ranchera is quite similar to Valseado, although a bit slower and more pronounced at musical accents.
In schematic form the strumming can be described as follows:
Where P is the thumb, and M the fingers of his right hand. The arrows indicate that the strings are pressed from the 6th to the 1st, with the thumb the most serious (eg. 6th, 5th, 4th and 3rd), and with the other fingers the strings more acute (eg. 4th, 3rd, 2nd and 1st).
To make things easier I put an animation with sound with the movement of the hand so that you can imitate it. With what you already know, should not take long to learn to do so with some ease.
