Not asking for tech support here, just wondering if in theory it would be possible to create a plug-in or even a complete browser that blocks ads in a way that’s impossible to detect. One model that comes to mind is a quarantined / containerized non-blocking virtual browser which queries the web server directly, then the UX filters the content from that container and presents it to the user ad-free. As far as the web server can tell, the containerized browser is just vanilla Chromium.
They’ll probably include a manifest with the video, telling the player what time ranges are un-skippable. A script could hook into that, and auto-skip them
That’s what uBlock Origin planned to do if YouTube ever decided to etch ads into the video stream itself.