Below are links to a series of mitt work drills from Roger Mayweather (filmed many years ago). Those interested in the Mayweather mitt system will find some useful information within. There is much more to what Roger does than the brief choreographed segments that are filmed when he is training Floyd. For example, you will see how he teaches the pull counter that Floyd has made famous (ie. right hand counter to the jab).
All five parts of the video can be found through the links below. Please note that the sound quality is much better in parts 3, 4, and 5. Fortunately, these segments also contain much of the actual instruction.