The Chocolate Factory has mysterious ways. To us it looks like one big Google, but internally each product is run by a team. Some teams play nicely with the others; other teams have a mandate that they have to follow in order to meet their corporate goals.
YouTube has been on a campaign this year to grab as many eyeballs for ads as technically possible. Their salaries and incentive compensation depend on growth from quarter to quarter (assuming they don't have even smaller time units for metrics.) It seems evident that part of the YouTube team is dedicated to the whack-a-mole task of reverse engineering and dismantling each ad avoidance technique or site as they emerge. The Workspace for Education support umbrella never extended to YouTube. This is why for years there was no real help for educator admins who were trying to get out of restricted mode for a given organizational unit.
With that as context, if I were on Team YouTube, I'd be stalking this forum looking for new sites and techniques to snuff out. If y'all are out there, please say "Hi" in a comment.
JantechNJ's advice is about the best we're going to get given how everyone is motivated in this puzzle.