This Warner Brother's cartoon with a pre-historical setting came out the same year as The Flintstones, though predates the debut date of the latter show. Unlike that series, which took its cue from The Honeymooners, this show found inspiration in another television show of the time - Wide Wide World hosted by Dave Garroway. It has a fond place in my heart. I remember watching this one on Saturday mornings. The premise is that a pre-historical film has been found depicting life in the Cro-Magnan era. We see the happy Cro-Magnans running around, interacting with dinosaurs and building cities much like our modern ones today. The social commentary is thick and heavy with a light touch.
This one-off short is rarely seen today, though it's available as an extra on the Looney Toons Golden Collection: Volume 6, and on YouTube, thanks to an upload by Sanek1994.
Obscurity factor: 8 (vaguely remembered, on DVD and YouTube)