Looked at the video.
Apparently Internet experts Jim and Laura are a retired profiler and a retired behaviour analyst, respectively. So neither of them are doctors or have any medical background to be able to say that the autopsy results were wrong and that's a very baffling claim to make.
I read the actual autopsy report myself. There's no question that she was strangled with the garrotte that was found with the body. Absolutely none, and it's very dangerous to start making up conspiracy theories about faked autopsy reports.
She was routinely sexually abused, and the night she was murdered, her vagina was penetrated, she was hit over the head, then someone made a DIY garotte and strangled her with it.
There are a lot of potential suspects, but the idea that Burke just accidentally hit her over the head - no. That doesn't explain the unanimous medical consensus on prior sexual abuse, the presence of the garotte, or the autopsy findings that the cause of death was strangulation.
Also I think people are misremembering what they've read online, or just not following the details very well. The theory (invented in slightly wilder parts of the Internet) is that Burke hit her over the head, the parents believed he'd killed her, so they created the garotte and put it around her neck in order to stage a fake intruder murder to cover up for Burke, and accidentally strangled her during the coverup. Which is.... pretty dramatic.
This thread is the very first time I've ever seen someone suggest that the autopsy was somehow faked/wrong and that she wasn't strangled. She was very obviously strangled.