I think this video was really interesting and informative. I think you should watch this one
Something that really stuck out to me, and this is something I have long believed to have somewhat of a kernel of truth, is that Michael often seemed to push his voice beyond its natural capabilities which made it very difficult for him to replicate certain high notes in the original keys of his song live. What do you think about this assessment?
Edit:
After watching the entire thing, I can say that there are a lot of inconsistencies, errors and straight up lies or misinformation presented to serve the narrative of the video.