edited and completed on video tape.
And there we go. That's the answer we're looking for.
Yeah? And...what? It was originally edited on video tape. That's no secret. You know what else isn't a secret? That the original film negatives were pulled and the footage from each episode has been scanned digitally and reedited in HD for the purposes of being presented on Blu-ray. They never touched the original edited episodes made for broadcast 20 or so years ago.
It seems like you're trying really hard to be "right" about this by purposely ignoring facts.