uBlock can also do this. I suppose if the ads cannot be retrieved, the video is supposed to handle it smoothly.
The only ads that cannot be blocked are those that streams over the same origin server, like Twitch's new embedded ads.
The only ads that cannot be blocked are those that streams over the same origin server, like Twitch's new embedded ads.
And if this supposition is violated, one would expect an error. I wouldn't personally have assumed that would work; it's probably the case that YouTube changed something that happens to also play ill with AdBlock (since AdBlock is basically futzing around with the content the page expects to be able to load, that should be expected).