Did you want me to debunk it segment by segment? I thought you said you'd spent hours researching this?
We have a fair idea of how good ancient people were with latitude and longitude. What your man there wants us to believe is that the Egyptians could accurately place a pyramid to a particular latitude which then reflects the speed of light.
Let's see how accurate the Egyptians were.
First off let's ditch the speed of light thing. That's in metres. The Egyptians used a cubit. I'm not sure what the speed of light is in cubits but it ain't going to match the google map latitude. Not sure they used a decimal point either, but happy to be corrected if they did.
Best I can get for comparison of latitude is the old system of degrees and minutes. If we use Ptolemy's Geography just as an example. He's consistently about 20 minutes out with his latitude and he's building on many centuries of work after the Great Pyramid had been built. Great Pyramid is 29 degrees and 58 minutes. So twenty minutes from that is 29 degrees and 38 minutes. Which would mean even if they'd used this number (which they clearly couldn't have been doing), they'd have put the Pyramid in a different place.
So, yeah, an example of trying very hard to fit a number to another number and proclaim 'I've discovered something' but in the process abandoning common sense, historical accuracy and any claim to having a critically valid method of formulating a theory.
Was that what you were looking for?