http://www.tate.org.uk/context-comment/video/tateshots-hilary-spurling-on-matisse
This is a brief 4 minute introduction to Matisse.
If you want to know more, Hilary Spurling has written the ground-breaking books on his life and work.
And there is also a half-hour radio programe with Frank Delaney on the topic of Matisse
http://www.bbc.co.uk/programmes/b007646h