YouTube's ad problem spells trouble for Facebook – analyst

It is now time for YouTube's "Extremist Hate-Speech Hour", occasionally brought to you in association with, until recently, some of the biggest brands in the world, including none other than AT&T and Verizon, among others.Not any more of course, because the two telcos are among a growing number of prominent companies that pulled their ad spend from YouTube and Google this week, after their adverts appeared alongside extremist material.The wave of withdrawals started to gather pace last week