In Q3 of 2018, YouTube reported removing more than 58 million videos and 224 million comments for policy violations. Alphabet says most of the content was spam. YouTube removed 1.67 million channels and the associated 50.2 million videos for three violations in 90 days or egregious violations with 80% related to spam, 13% to nudity, and 4.5% to child safety.
Earlier this year, YouTube began issuing quarterly reports about its policy enforcement efforts. The move followed advertiser boycotts due to ads appearing next to obscene or questionable content.