When mother-of-two Stephanie Lenz posted on YouTube a 29-second video of her young children dancing in the kitchen to Prince’s song Let’s Go Crazy, she probably wasn’t expecting to set an important legal precedent.  But that’s just what she did.  In a decision arising from Lenz’s action, the Ninth Circuit held that copyright holders must consider if unapproved use of their work constitutes “fair use” before sending a takedown notice under the Digital Millennium Copyright Act.