Search and it will ask you to clear the cookies.
Try turning off Enhanced Protection / turn on Standard Protection, turning on Privacy Sandbox trial and turn on FLoC. Allow scripting in Chrome, refresh the page and give it a few minutes to run in the background.
Get the details from the ChromeBook post:
https://www.askwoody.com/2021/tasks-for-the-weekend-how-is-your-chromebook/
First I run a page linking to YouTube such as the ChromeBook post above.
(alternative the current Tips for the Weekend:
https://www.askwoody.com/2021/tips-for-the-weekend-why-are-you-still-on-2004/ )
Click the YouTube link and YouTube should work
Having the same problem with google.com; my solution there, is to use Chromium.