A woman in California has won a partial victory in a lawsuit against a record company that forced her to remove a video she posted on YouTube.

The woman posted a video of her young child dancing to the Prince song Let's Go Crazy.

Universal Music, which owns the copyright, demanded YouTube remove the video - which it did.

With help from a group of free speech activists she filed a suit saying her video constituted a fair use of the song.

A California judge has ruled in her favour, saying she is entitled to at least recover her legal fees.

Observers say this is an important case in copyright infringement law.