No ads shield in Youtube anymore


Description of the issue:

Exact URL of the website in question:Youtube

Screenshot of the ad as it appears in Brave:

**Did the issue present with default Shields settings? (yes/no)**yes

Does the site function as expected when Shields are turned off?

Does the ad appear when using a Private window as well? (yes/no)

What OS are you using when you see the ad? macos BigSur 11.2.3

**Brave version (check About Brave):**1.73.104 Chromium

I’ve been using Brave since about 2 months, with a perfect shield anywhere, but it doesn’t protect anymore from ads in Youtube (and I think elsewhere too) since 2 weeks :-/ and I don’t know why?
Thank you
Marco