I have recently made a habit of waking up early, and as a by-product spend my mornings catching re-runs of The Donna Reed Show. I've noticed in a number of episodes, though not necessarily all of them, that the video seems to be sped up; characters either seem to speak too quickly, or their movements look rather stop-motiony. If a specific example is needed, The Foundling was the first instance of this I noticed.
Was there a habit of speeding up TV shows back in the day? Or maybe this is a choice made by the channel broadcasting the re-runs for commercial reasons?