Welp, initial tests on Twitch.TV and I had no ads. Typically if I pick any live channel I would first have to watch an ad, then it would move to the live stream. This morning after a filter update I tried three different live channels and none of them started with an ad, they all went straight into the live stream.Blaz added a filter for Twitch in the Base filter. Check for filter updates, and you might need to clear your browser's cache.
I'm using the same version of Google Chrome and no ads anymore.I am also seeing ad videos at the start of viewing streams. Currently I have not watched streams long enough to tell if I get them while watching the stream. I have done what others have suggested above and still see them. Current version of Chrome is 85.0.4183.121..