ChessVibes is a great chess web-site/blog with lots of interesting content. A highlight from the past year is their coverage of the Wijk aan Zee tournament held in January 2007, where most of the strongest players in the world played. They have videos taken from the post-game press conferences; in each video, the winner explains his victory for some 20-30 minutes.
Here are links to a couple of the best videos:
If you like these, you can easily find lots more (with Anand, Topalov, Aronian, etc. explaining their wins) from that tournament.