Disney and Nestle are among a group of large brands to remove their adverts from YouTube after they appeared on videos showing offensive content.
The brands made the decision after videos by YouTuber Matt Watson called out the platform for failing to prevent a "soft-core paedophilia ring".
In his first video on the issue, Watson highlighted a number of videos that were not explicit or overtly sexual in their nature, but users had been flagging moments that underage girls were in compromising positions while exercising, or standing in front of a mirror in swimsuits. He claimed YouTube was failing to tackle the problem.
Following the video, YouTube said it took "immediate action" to delete channels, videos and comments.
In a statement, YouTube said: "Any content - including comments - that endangers minors is abhorrent and we have clear policies prohibiting this on YouTube.
"There's more to be done, and we continue to work to improve and catch abuse more quickly."
Watson then contacted a number of brands, including Disney, Nestle, Dr Oetker and Epic Games, the creator of Fortnite, highlighting where they adverts had appeared on such videos.
A spokesperson for Nestle said: "We will revise our decision upon completion of current measures being taken ... to ensure Nestlé advertising standards are met.
Fortnite maker, Epic Games, said: "Through our advertising agency, we have reached out to Google/YouTube to determine actions they'll take to eliminate this type of content from their service."