I'm not sure this will be appealed as fair use does cover commentary and discussion about a video as long as the person doing the review is in fact saying where the footage is from and crediting the source. The quick review of the lawsuit that was brought looked more like the guy was saying he was (butt) hurt due to the usage of his video by another youtube channel that was making fun of them which if you watch the original video, they were actually saying the guy should have his own show on a major channel.
That case did fall under fair use and sounded like a couple of well paid youtubers going after each other and only the lawyers made money.
Just like a local TV station crediting video from a football game in their sports part of the news. If a NBC station credits CBS Sports who owns the broadcast rights and shows clips of the game in their news broadcast but screen credits CBS Sports, that would fall under fair use. Just like if a TV network or local station credits Youtube for using your video under the youtube terms of service, technically it is fair use.
Hence, watermark the heck out of your videos.
https://www.youtube.com/static?template=terms
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