I don't know if this has been mentioned on the site before but I stumbled across this video on YouTube. it shows precursors to the bicycle like the velocipede in use. it then goes on to give an overall view of bicycles in the bicycle industry as it was in 1992, that's almost 25 years. sure you can laugh at the old giant computers then the impossibly inadequate bicycle lighting but it's very interesting especially when it talks about the different manufacturers and manufacturing centers. anyways here's the link enjoy!
https://youtu.be/Cut_sYkNcIM