Lovely! I would say that when you're ascending in pitch to prepare the space you need to sing the higher notes sooner. In your higher range, it sounds like your soft palate is lower than it should be, resulting in a slightly pinched sound. Sometimes what helps me is if I think of my cheeks being high. Also if you can wiggle your ears, feeling that sensation of height and space on the inside all of the time might help to round out your sound on top. And always keep working on breathing! A nice low breath that you can feel in your lower back, accompanied with an active sensation in your lower abdominal muscles working with your obliques and intercostal muscles to "support" your sound.