There are three main claims in this fact-check. I will attempt to fact-check all of them, but some are harder to investigate than others and rely more on speculation, which I will try to avoid. I will not be watching the hour-and-a-half documentary to comment on this, but if someone has more free time than me, I would gladly welcome anyone to add on to my findings for this fact-check.
1)Derek Chauvin is not a murderer but a scapegoat, and the hold he used was a standard police hold when a handcuffed person is continually resisting arrest, called an MRT trained by the MPD.
For the first claim, I was able to find a PDF (linked below) of the MRT outlined by the City of Minneapolis and posted by their government. The PDF is from back in 2014. The maneuver outlined in the PDF does not resemble anything that Derek Chauvin did and notes to constantly monitor the detained person. Link to PDF: Use of Force Policy Excerpt
2 )Asphyxiation was cited as the cause of George Floyd's death, but the autopsy found no evidence of death by asphyxiation. Instead, he died of cardiac arrest and had a near-lethal amount of fentanyl in his system.
The second claim is also not very strong. The autopsy report (linked below) shows Floyd had an 11 ng/ml amount of fentanyl in his system; the lethal dose is 2mg, which is equivalent to 2,000,000 ng/ml. The amount Floyd had in his system was the recommended amount for anesthesia, as outlined in the report on fentanyl linked below. However, there were multiple drugs found in his system, including methamphetamine, and I could not say for absolute certainty that this did not play a factor in his cardiac arrest that led to his death.
Link to Floyd Autopsy Report
Link to Fentanyl Report