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I think you sound pretty darn good for just 2 years. Very well done.
However, you will need to practice vibrato all by itself to make it wider. I can hear it, but it is very narrow and the impulse seems to be coming from your fingers rather than wrist or arm. The second thing that I notice is that you are using only the upper half of your bow most of the time. It might be good to practice forcing yourself to use the whole bow more often. I know bow management is difficult and somewhat boring to practice, but it is vital to become a really good violinist.
You really are a good player. I hope to see more videos in the future.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. ~Herm Albright