All we can do is recognize the truth:
If you saw it yourself then you know what happened.
If you saw it on video then you know what happened.
If not, it’s all he-said, she-said.
only after forensic analysis has been done to make sure the video has not been tampered with in any form or fashion.
I saw dinosaurs eating people and each other in the Jurassic Park series. I think maybe it didn't happen. The point is, video can be edited and FX added, so you have to be cautious even believing your eyes when it is a video.