That's all quite interesting Mike.

I can't get my head around why a circle with a dot in the middle should be a CD and not any of the zillions of other things that look like a circle with a dot in the middle, or the zillions of abstract concepts that could be represented that way. Maybe it was time travellers from the 60's and that's a record sitting on a record player, the hooked arm is the stylus.

That seems to be his only connection. But he doesn't even show an actual photo of a hieroglyph/pictograph of any circle with a hole in the middle. Just a modern drawing with an inner circle (possibly a hole), and an ancient drawing with a dot - not necessarily a hole either.