I think he means the ad thumbnails, not the in-video ads themselves. Ublock hasn't been able to hide them for a while now.
Current strategy is to turn down the volume and scroll down to the comments / look away for 10 seconds.
Ads are very irritating
https://addons.mozilla.org/en-US/firefox/addon/sponsorblock/
https://chrome.google.com/webstore/detail/sponsorblock-for-y...