As I was listening to these, I probably said, "This guy is good," at least a half-dozen times. You definitely have an understanding of the subtleties of composing for the instruments in these videos, likely others, too. The counterpoint studies were especially impressive! But I enjoyed each one of them in their own right (Anger was probably my favorite—I love the use of quartals harmonies). Fantastic, Ivan, just fantastic. I'm looking forward to enjoying more of your stuff!
I realize you're still experimenting with finding "your own voice," but, in my opinion, you're doing very well.
P.S. I noticed some Catalan sprinkled in some of the scores. Pretty cool language.
Cheers!