Possible Clues:

• John Williams won its 2016 Life Achievement Award: Abbr
• "100 Years...100 Movies" org
• Movie-archiving org
• '100 Years ... 100 Movies' org
• “100 Years...100 Movies” org
• '100 Years ... 100 Movies' org.
• Band with the 2006 album 'Decemberunderground'
• Movie org. that created a top-100 list from which all of this puzzle's quotes come
• Movie-excellence org.
• Movie list org.