GM Daniel King - Power Play Chess.
https://www.youtube.com/user/PowerPlayChess
Lots of top tournaments analysed in a very straightforward easy to understand manner.
IM Andrew Martin - Yateley Manor ChessMaster
https://www.youtube.com/user/YMChessMaster
One of the best teachers out there imo.
Post them Below. Include links.
Here are some of mine:
Saint Louis Chess Club: Great Lectures by many different GMs.
http://www.youtube.com/user/STLChessClub?feature=watch
Online Chess Lessons: Nice Game Analysis
http://www.youtube.com/user/OnlineChessLessons
Chess Explained: International Master Christof Sielecki comments on his blitz games as well as other games. He give great insight into the thought process and inner dialogue of a strong player.
http://www.youtube.com/user/Chessexplained/videos