" Timesweep "/Segue/Medley of BILLBOARD #1s

I found on YouTube, and listened to-day, to must have been one of the first, if not the first, " #1s week by week " explorations...A 3-part post of, as it was labeled, " History of Rock & Roll Timesweep ", though I can't t link from here.
It's from the 1978 version of that Drake-Chennault " History..." radio mini-series - perhaps someone else has edited-together or other versions - I SO well remember listening to it on my lil' radio/tape player and taping at least some of it! Alas, my tape is LONG, long, gone - and everything else from back then, too.
But, anyway, it goes from early 1956 to late 1977, I presume that the pre-Hot 100 period drew from the Top 100? And, there's a whistling-hook E-Z instrumental early on I can't quite place - is it Nelson Riddle? Oh, and Bill Haley is SOL again.