Si el uso es sin fin de lucro y educativo
Si fuera tan simple el fair use.
"[A] reviewer may fairly cite largely from the original work, if his design be really and truly to use the passages for the purposes of fair and reasonable criticism. On the other hand, it is as clear, that if he thus cites the most important parts of the work, with a view, not to criticise, but to supersede the use of the original work, and substitute the review for it, such a use will be deemed in law a piracy."
The Campbell court held that hip-hop group 2 Live Crew's parody of the song "Oh, Pretty Woman" was fair use, even though the parody was sold for profit. Thus, having a commercial purpose does not preclude a use from being found fair, even though it makes it less likely.
The third factor assesses the amount and substantiality of the copyrighted work that has been used. In general, the less that is used in relation to the whole, the more likely the use will be considered fair.
The fourth factor measures the effect that the allegedly infringing use has had on the copyright owner's ability to exploit his original work. The court not only investigates whether the defendant's specific use of the work has significantly harmed the copyright owner's market, but also whether such uses in general, if widespread, would harm the potential market of the original. The burden of proof here rests on the copyright owner, who must demonstrate the impact of the infringement on commercial use of the work.
Se tienen en cuenta los 4 factores para decidir si es fair use o no, y los 4 factores son una escala de grises.
Para el caso que se esta viendo, tocar 2 acordes en un ritmo no es copiar sustancialmente la obra original, ni afecta negativamente a la comercialización de la obra y aunque en ese caso lo hace para lucrarse, tambien lo hace para educacion.
Tiene mas de 2 factores en su favor y el cuarto que no menciono solo tiene que ver a la hora de registarar el copyright de tu contenido.