Dynamics are important when you want to express yourself. That would be one of my biggest tips. You made a diminuendo at the end but mostly it was powerful throughout.
For the vibrato, I think your left hand is a bit tense. Try relaxing and doing some basic single note vibrato exercises.
Lastly, listen to every single note for your intonation. Learning to play more in tune will put you on a whole different level.
Great job, thanks for the post.