For a while now the transition away from Manifest V2 (MV2) to MV3 has been on-going and it looks like it is entering its final phase of deprecation, at least, in the case of Google Chrome. A recent discussion thread in the w3c WebExtensions Community Group GitHub repo has highlighted how the latest and upcoming versions of the most popular browser are expected to be its final releases with support for MV2 extensions.
What this essentially means is that the tricks and bypasses that were used to keep MV2 extensions like uBlock Origin and others alive will not work any more on Chrome, or at least not for very long. For example the Windows Registry mod that could extend MV2 availability will cease to function after Chromium version 151.
a DNS AdBlocker just stop a request to a specific domain. If youtube serves video and ads from the same server you do not know which one is an ads and which one is a video on the DNS level. Furthermore you have some devices hardcoding DNS server (google homes are common for calling google DNS directly instead of getting the DNS from the Router) which makes it very hard to use DNS level AdBlockers.
Google spends a lot of money mixing ads and legit content to make it impossible to block, it is not safari "letting ads through" is more like safari cannot identify ads anymore.
Ohh, cool that makes more sense. Thanks for the info. Eventually I'm gonna get PiHole set up, but I guess that would face the same issue... yt-dlp might be the best way