That particular sign-off (and sign-on, too) and the first four logos of this montage (0:01-0:08) were a big part of my childhood when I watched WOSU. Now if only WOSU had a time capsule to store all these logos and continuity in...
The WOSU logo from 0:03-0:04 (either used 1999-2007 or 2002-2007, can't actually distinguish the timeframe for how long they used that station ID, regardless of how long it's been) gives me a reminder to flash on back to my childhood when I watched its PBS Kids Block in either preschool or kindergarten.
I enjoyed this video, and wanted to track it down again for an encore; but it was hard to find. The search engine could trace the video more easily if you were to use more keywords for the "Tags" line. In this case, "WOSU," "Columbus," and "analog" would be fitting here, as well as "Signoff."
The only thing that would've made this better was if they played their old signoff film (with "Carmen Ohio" playing) either just before or just after this montage...