In what may be the "Glee" star's final video he has hopeful, sad advice for young viewers
The late "Glee" star also deals drugs in the upcoming drama, "McCanick"
For years, the "Glee" star reversed the trajectory of so many troubled young stars
Special featuring remembrances from Jon Stewart, Conan O'Brien, Sarah Silverman and others to debut March 18
Actress lost consciousness during takes on recent Oregon shoot (updated)