@dangillmor Google's move to ban ad blockers also extends to YouTube, but there is a way around it.

Create a private blog, (eg a Blogger blog). Copy the embed code for a YouTube video. Paste it into a Blogger post and publish. When you watch the video on the blog it will be ad free.

This is only worth doing for long playing YouTube videos, but it also works with playlists.

This is not a good move though for a YouTube channel you like that deserves support.