[Freddy]

The comments and analyses from you who critiqued the video of this screening situation were really very insightful and enabling. All responses have been duly noted.
What the official at C reported after studying the video of this play was this: he admits to being so focused on the defender ("officiate the defense") that he did not have the "wider view" necessary to take in everything happening on the play. While watching exclusively the defender, a good look at what the offensive player setting the screen from behind completely escaped his notice. This, therefore, has become a local study clip on the topic of "The Consequences of Telescoping - How to Miss Illegal Screens".
Your responses that mentioned other perspectives, opinions, and concerns, however, have been registered and will be included in future discussions when this clip is used for group study. Again, your comments and analyses above were really very good. Much thanx.