Video-sharing site YouTube has signed a deal with media giant Warner Music to allow its material to be used legally.
It means interviews and videos by Warner"s artists can be used in return for a slice of advertising revenue.
The agreement also covers the use of material in homemade videos, which form a large part of YouTube"s content.
Both companies hailed it as a landmark agreement, coming days after Universal Music said it was considering legal action over sites such as YouTube.
A royalty-tracking system has been developed by YouTube to detect when videos on the site are using copyrighted material and work out how much Warner is owed in advertising revenue.