This is fair use:
Content is used for Criticism and Comment, by a Nonprofit Educational Institution. It is an already Published work, but only a very Small piece is reproduced. Portion used is not central and not significant to entire work. Amount is appropriate for favored surgical educational purpose. Also, the user owns purchased copy of original work.
Video legal da Discovery explicando o que é parestesia, vivo explicando isso no consultório. (É possível ligar legendas)