Sometimes when I will watch a video on youtube, the platform shows me an ad approximately 1min duration what I can’t skip (with the shields up). But if I refresh the page the ad goes away. Did you can tell us if the youtube are recognizing the blocking and dodging the adblocker? If that conditional is true, Brave team will need update the adblocker.
Brave version: [Version 1.9.76 Chromium: 81.0.4044.138 (Official Build) (64-bit)]