Sentence 1: David found a few film reels at his parent's home. 
 Sentence 3: They were from the sixties 
 Sentence 4:  David had the reels restored and converted to DVD 
 Sentence 5:  He gave the DVDs to his parents for Christmas 
 Option 1: The film reels were homemade. 
 Option 2: The film reels were homemade and so brittle, they had cracked to pieces.