Hi danilo,
I just listened to both Ballades, and believe you've made a really fine effort on these pieces. I find that Brahms's idiom is sometimes difficult to manage, as he very often thought orchestrally while composing. Thus, some of his figuration now and then is not very pianistic (that is, awkward), which adds to the challenge.
Obviously, you're still working on some fine points, but overall your renditions are quite beautiful in my opinion. I have yet to play these ballades, although they've been on my to-do list for a long time now. So I can't comment in detail. One suggestion would be that you could listen more judiciously to your pedaling. Overall it's quite good. But there are a few places where you had caught too many neighboring notes and/or passing tones, or there was a large buildup of too many overtones requiring a different pedaling approach--maybe more changes, half-pedal releases, or flutter pedal to clear the clouding sonorities. But again, these pieces seem to be coming along very nicely. Good job! I'm glad you posted these works.
P.S. I also noticed you tuned your piano before making these recordings.

Unlike you, I can fix a few notes, but cannot tune the entire scale. And to pay for tunings for every recording would add up.