I used to be addicted to youtube too, and when looking for a browser extension I found that just adding /etc/hosts entry (on a mac ) works well enough for me that I don't need an actual plugin. 127.0.0.1 youtube.com www.youtube.com
It's fast, and when I need to use youtube I just uncomment out the line in vim.
It's fast, and when I need to use youtube I just uncomment out the line in vim.