The New ICE Footage of Incident

The officer was filming with his mobile phone.

https://www.youtube.com/watch?v=ryY9an4N840&t=159s

Other sources confirm the video, and it is not a fabrication.

https://www.bbc.com/news/articles/cz7yv4524gqo

https://www.youtube.com/watch?v=bcOfsg749Wk

https://www.thetimes.com/us/american-politics/article/minneapolis-shooting-bodycam-video-ice-jonathan-ross-renee-good-0prdhrcdf