Here is a drill with former Michigan Coach John Beilein for defending 3 point shots.
The video is hosted on YouTube.
You will need to be on a network that allows you to access YouTube.
Click the play arrow to view the video.
There is narration with the video, so please make sure that your sound is on.
You can find out more about the Championship Productions video that this clip is from at this link: The More Things Change, The More They Stay the Same.
The video with Coach Beilein is available in both DVD and online format.