Nice video and good channel! It's important to know that the point of Sanz' book is to teach you how to improvise over the grounds like the Folia. So the variations he provides are just samples of the ways one can improvise over the chord progression and to perform this piece it's best to add your own improvisation. The simplest way to do this is to have strumming variations just on the chord progression. Often classical guitarists mischaracterize his music as "easy" (try Jacaras, by the way. Very challenging) but I think that's because you aren't playing half of the composition which is meant to be made by the performer! Also Sanz' vibrato symbol is "#" not "vib."
And of course Baroque guitar only has 5 courses. The bottom E is non-existent. In addition, the D and A courses were tuned higher instead of lower, like the high G on a soprano or concert ukulele if tuned in unison. Otherwise those bottom two courses were tuned in octaves. The other alternate tuning was only the D was an octave and the rest were unison. Use of either octave tuning made it possible to play Campanellas.
