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YouTube might slow down your videos if you block ads
(www.pcworld.com)
This is a most excellent place for technology news and articles.
I've been getting them over the last week or so on both Chrome at work (Ublock lite) and Firefox at home (UBlock Origin). It's just a popup telling me adblockers aren't allowed and then a second smaller popup saying something to the effect of "loading issues?" with a link as the video delays playing for a few seconds.