Hi Andres, good to see you on some heavy stuff !
One the main riff at the beginning, some of the notes are not coming through. One the first chord, your index finger is not quite covering all the strings so the note on the B string isn't coming through. Same with the 3rd chord.
The section at 0:34 needs to be more controlled. Use light palm muting to help the notes stay separated so they 'pop' out.
I notice that you don't move your wrist joint much.. you use your whole arm to alter the position of your hand. Try loosening your wrist and letting it swing up and down to hit notes instead.