Just a few logical thoughts: Because of the reason posted before. Considering the MCT creates the ISO with install.esd to keep it under 4GB, to fit FAT32 max filesize, the USB will have 2 install.esd files too. The MCT requires a 8GB USB minimum, so it will fit 8GB, with swm there is no compression, just splitting the wim. Consumer ESD's, the only ones who contain Home, don't even contain pro-work or pro-education (or their N versions). Linking to all kinds of external crap when being on a technical website who is the source for almost all developments....
That has nothing to do with a minimum requirement from the MCT, over here you can still get USB sticks in all sizes you want. The questions can only be answered by MSFT or someone who invested the 100+dollar/euro for an USB containing a free OS.
NTFS for booting will only support Legacy BIOS installs. Tools like Rufus create a small partition (FAT32 or GPT) on the USB to be able to boot EFI and redirect to the NTFS partition for the actual installation files. Inplace upgrade is when using the same build ISO to perform a repair upgrade, to go from one major build to higher one is called Upgrade. When you install a (new build) system you will do a clean install from boot.
I showed the 14393 (aka 1607) install.wim (home only) < 4GB. But again, no-one in it's right mind will waste 139 USD to get a Home Edition USB.
Im not forcing anyone to buy it rather to ask people who already bought it to inform how it looks like since it interested me that my usb was different than anything we can find on web. Maybe some day there will be someone willing to share it. Either here or on reddit for example. Ive seen people post unboxing videos but they are not willing to spend 5 minutes to make screen shoot of whats inside x64 folder for example and whats the size of those files. The second curious thing is even if there is install.esd will it be the same as mct creates...
Both videos skipped most of the copy files part, there is no difference in speed between using wim, swm or esd.
The biggest difference between install.esd/wim and swm is that swm copies files and yes its a noticable difference in the first stage and thats what can be observed on czech video and not on yours or others. Im not saying that there is install.swm for sure just the first stage behaviour signals that. When there is no install.swm it usually just blinks 0-100. And on his video it was loading up longer than second stage which is unpacking files or something. If the first stage of installation takes longer than second and thats what i saw on this video then either he changed speed of video on 2nd stage or its install.swm.
That stage is the same for whatever you use, wim, esd or swm, all copy files over. I will show you a real time videp