The expected Apple M1X SoC has been broken down into four potential variants for the upcoming MacBook Pro 14, MacBook Pro 16, and Mac mini. The system on a chip's configurations are decided by the amount of unified memory and the GPU core count. It has been rumored that the M1X will have a 10-core CPU part.
https://www.notebookcheck.net/Apple-M1X-SoC-broken-down-into-four-potential-variants-for-the-MacBook-Pro-14-MacBook-Pro-16-and-Mac-mini.557250.0.html
Regarding the memory, the argumentation is poor. I.e. memory is separately soldered on the soc. It is not produced as part of the chip.
Exactly, it's produced by Hynix, not TSMC. And if TSMC costs increase Apple's overall budget, it doesn't mean they'll have to save on RAM, they can just pass the higher costs on the consumers.
I'm surprised to see this YouTuber considered a viable source. I watched the video and he's just thinking and speculating. This is not more than slightly sophisticated bar conversation. Entertaining but not informative.
Here's a video of some random dbag with stupid YT thumbnails speculating about something that really anyone else on the planet could. But lets send ad revenue his way. Lowest common denominator...