Yoshi1001
Statistical Anomaly
- Joined
- Jan 29, 2007
- Messages
- 775
- Reaction score
- 15
I would speculate that reaction videos can be considered to be criticism or review, which certainly is Fair Use
Also, I suspect it generally helps drive traffic to the original video, which benefits the creator.
As far as reviewing claims, YouTube (even as a subsidiary of a large company like Google), doesn't have the resources to review every one, especially since I assume most aren't disputed. That being said, random audits (I'm assuming they aren't being done already) could go a long way to improving some aspects.