Hey bros

I have a Nikon D7100. Got it because thats the camera Kfir Ocahion uses. Ive tried reaching out and asking him what type of lens he uses but it was to no avail

I want to get a lens that could get me good video recording quality. What I want to do is basically record me playing guitar in HQ.

Example

https://youtu.be/Q5lXyagkziI

What lens should I get that would help me achieve something like this? Pic related is my camera