YouTube is reportedly testing server-side ad injection, which breaks several ad blocking tools.
It’s also testing limited logged out access to the site, prompting some users to sign in to watch videos.
However, some tools have already circumvented the latter restriction
“Sign in to confirm that you’re not a bot.”
cobalt developers have since found a way to circumvent the login restrictions
SponsorBlock team notes in an FAQ that this, server side ads, shouldn’t signal the end of ad blocking tools, but it does make their implementation much trickier. Some users, especially on the uBlock Origin subreddit, have encountered ads even while running the plugin.
https://www.reddit.com/r/uBlockOrigin/comments/1de9kv5/youtube_is_currently_experimenting_with/
The fire continues