It seems that it is often understood that copyrighted works can be used as parodies or satire. In some cases derivative works clearly match this definition, in others it can be difficult to tell. I understand this difficult may be opinionated so I have provide the following major concerns.
Is there any difference in fair use copyright law between using the following:
1. Copyrighted image of a copyrighted character
2. Own image of a copyrighted character
I have seen many videos on YouTube with people playing with copyrighted character toys often with a story. They often have huge view counts and seem to be operated as a business so I assume the content is monetized.
Is this protected under fair use, and if it is then why could someone not copy a copyrighted anime and change only the story under fair use?
※I understand laws vary by country, and are often determined more by case results so answers based on common treaties/laws and case results preferred.