If all that was needed to determine guilt was to watch a documentary, we wouldn't need courts of law.
I didn't see the MJ documentary but even if I had and had come to a conclusion as to the truth or otherwise of the two men's testimonies, I think such a conclusion would be unreliable.
In a court of law witnesses can be questioned in more detail and other evidence presented. It is not taken for granted that everything a witness says is true, even if such witness comes across as very convincing.
It seems to me, therefore, that no-one can say, one way or the other, that MJ did what has been claimed, but neither can anyone assert that he was innocent.
The fact that MJ was an extremely wealthy man and his estate has continued to amass wealth complicates things. It is possible that the hope of financial gain is behind these resurrected allegations. Alternatively, the allegations may be true and the men in this documentary were, through misplaced loyalty or fear, unable to tell the truth when the case was previously heard.
Either way, we'll never know.
I'll continue to enjoy MJ's music and videos but will generally avoid doing so while my grandchildren are around.