youtube.com www.youtube.com youtube-ui.l.google.com # CNAME for (youtube.com) www.gstatic.com youtube.be s2.youtube.com googlevideo.com youtubei.googleapis.com ytstatic.l.google.com .ytimg.com i.ytimg.com ytimg.com ytimg.l.google.com
video-stats.video.google.com # not video-stats.l.google.com
s.youtube.com video-stats.l.google.com
This regex seems to prevent a lot of Youtube ads.
r[0-9]*---sn-.*-.*.googlevideo.com
^r[0-9]+-+sn-+[a-z0-9]+-+[a-z0-9]+\.googlevideo\.com$