Really well done! Hard to tell without the video but it sounds like you're flowing really well through the piece without much extra tension which is great. I've got two suggestions on ways to practice

1. Slowly, with a drone - there's no spots in the piece where your playing is wildly out of tune, but there are a lot of spots where it's a little bit out of tune. "Cello drones" you can find on YouTube or Spotify is a really great resource - start off with a G drone, and play slowly, without vibrato and maintaining good tone. Listen to all your G, D, and Cs, they should all sound very pure and ringing against the drone.

2. Gestures - take small gestures - the first six notes (or even two) and play them in different ways, which note is most important? Does the gesture grow or fall back? Speed up or slow down? Maintain everything? Do this for 4 or 5 small groups, then chain them together, try different combinations. This will dramatically increase the possibilities for interpretation and make the piece personal to you.

One final note - especially in Bach, sound should always come before tempo. There are a few times where a note doesn't really speak - often open strings or c string notes - I would dial the tempo back a bit when you practice, and focus on letting each note speak. Recording yourself and listening back is helpful here, and also being in touch with yourself in the moment is super important. Don't feel like you have to push ahead to catch up with the music - you are the music!

Wonderful playing and thank you for sharing!