That's like saying can't the Judge decide who the killer was when he literally saw the video of shooting.

Or like if a piece of evidence was obtained lawfully?

I can understand why people and me included might think they can decide this before trial.

These days, video evidence can be called into doubt pretty easily

One still need to decide:

- if the video is real (not AI / edited / another event)

- if the subject the same person (twins, look alike, too bury to tell)

etc