The end game here is to simply turn all personal computing devices into locked down ecosystems that the user has no real control over, basically what iOS already is (and Android isn't too far off from).

All code being executed on the device, from the bootloader all the way to the browser or youtube app, must be approved by the manufacturer, with an opaque black box security chip inside the device verifying that this is true and providing a signed message as proof that has to be sent to Youtube servers before videos are served. This completely eliminates the issue of both adblockers and third-party frontends.