For some people Takt Time is still a new concept, but it has been used (even if not always knowingly) for a long period. You probably know that in order for your process to flow, process step cycle times have to be in line with customer demand rates as defined by Takt Time.
Well, sometimes this is easier said than done. This 1950s video from I love Lucy (the most successful comedy series of that period in US) shows in very clear terms that adapting to Takt Time is not always easy.
Enjoy it!