Defensive gun uses are seldom reported by national news outlets; unlawful shootings, by contrast, are reported relatively often.  Local news reporting, however, much more frequently includes both types of stories.  This is especially true in more gun-friendly areas.  The following links are to video clips of local news reports of defensive gun uses.

Student Shoots Home Invaders - Saves 10 Lives!

Armed Citizen Saves People at Grocery Store

Female store clerk shoots and kills would-be robber

This link is to a YouTube playlist of news reports of defensive gun uses:  Armed Self-Defense