It’s not impossible to analyze and test compiled binaries.

When they say such things, the are probably talking about the expected value, where those chances are taken into account, just like the number calculated in this article.

AFAIK there is no need to re-encode, since Youtube videos are stored and served in chunks anyways. The change is that they are now slipping in the ad chunks as if they were a part of the normal video chunk stream.

Here’s an image viewer example with 0 exposed HTML elements (all UI rendered through a single canvas) and 0 human readable code (all client side code compiled to webassembly bytecode). Trying to block unwanted content in this kind of site would be closer to cracking a video game or patching an android app.

slowly open it up to the point where you can actually install regular linux apps on it

The linux running Chrome OS is completely separated, by design, from the virtual machine that runs linux apps under Chrome OS.

Definitely not to have android apps on a Linux tablet, because in-waydroid rotation doesn’t work, and rotating the tablet itself breaks the windowing system until you reboot the container. Issue first reported in 2021.